MXPA99005976A - Hair coloring compositions - Google Patents

Abstract

A storage stable, re-usable hair coloring composition comprising:(a) an oxidising agent;and (b) an oxidative hair coloring agent;wherein the pH of each of (a) and (b) is in the range of from about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of from about 1 to about 5 and wherein both (a) and (b) are capable of being stored at low pH, either separately, or, once mixed, for at least 1 month at room temperature and wherein the resultant color delivered to the hair (Delta E) is up to about 75%, preferably up to about 85%, more preferably up to about 90%and most preferably up to about 95%of the total color delivered to the hair (Delta E) from a mixture of (a) and (b) on mixing. The products are storage stable and re-usable and can provide excellent hair coloring and in-use efficacy benefits in combination with improved color retention potential after storage at room temperature.

Description

COMPOSITIONS OF DYE FOR HAIR TECHNICAL FIELD The present invention relates to processes and compositions for hair dyeing and, more specifically, to hair dyeing compositions comprising any of: (i) a separate, storage stable, oxidizing agent component in combination with a oxidative hair dye component, stable to storage, separated, each at an acid pH of between about 1 and about 6, which when combined, result in a dye composition, reusable, stable to storage, combined, having a pH of between about 1 and about 5, or (ii) a reusable, storage-stable mixture of oxidizing agent and hair dye oxidative agent at a combined acidic pH of between about 1 and about 5.

BACKGROUND OF THE INVENTION The desire to alter the color of human hair is not a facet of modern times. From the days of the Roman Empire the color of human hair was routinely altered to adjust for changes in fashion and style. However, the achievement of precise colors PS38 initials that were retained by the hair for a desired period has remained an elusive goal. The difficulties in the development of hair coloring compositions that can provide accurate and long-lasting colors are due in part to the inherent structure of the hair itself and partly to the conditions necessary for the effectiveness of the processes for dyeing the hair. Over the years, important effects have been realized towards the elimination of many of the problems associated with the dyeing of human hair. Several approaches to dyeing have been developed, including direct-acting dyes, natural dyes, metallic dyes and oxidative dyes. To dye human or animal hair using oxidative dye technology, the hair is usually treated with a mixture of oxidative-type hair dyeing agents and with an oxidizing agent. Hair dye oxidative agents and oxidizing agents can be used to supply a variety of colors to the hair. However, substantial improvements are needed in the area of the application characteristics of the dye compositions, for example time to prepare the dye composition, avoid complicated operations in the application, waste of the unused product, waste of packaging (for using systems of multiple components), storage stability (of the dye composition once mixed) and the ability to reuse the mixed dye composition. Reuse of a coloring composition, as defined herein, refers to correction of errors, retouching or root coverage and re-tinting future hair with the same product as well as color and / or tuft tests on small areas of the hair. In addition to the improvements in the application characteristics that are detailed in the foregoing, a substantial improvement in dyeing characteristics such as color saturation, color development, accurate initial color consistency, improved color fastness as compared to washing, improved color condition and lower levels of hair damage. Conventional oxidative hair dye compositions generally comprise at least two components packaged separately. Typically, these components include oxidizing agent (below pH), for example hydrogen peroxide and dye material (at high pH) for example oxidative agents for hair dyeing. In order to facilitate the hair dyeing process, these components are packaged separately and are generally mixed before being applied as a hair dye composition. After mixing, these high pH compositions tend to degrade, which can lead to decreased or decreased ability to stain. High pH hair dyeing compositions are typically used soon after mixing. In general, any combination dye composition is discarded after the application of the required amount to the hair. Furthermore, these conventional dye compositions, once mixed, can not be stored or reused, since the activated oxidative dye system deteriorates rapidly over time. Therefore, it would be desirable to develop an oxidative hair dye composition comprising oxidizing agents as coloring oxidative agents that is storage stable and / or reusable. As discussed below, oxidative-type hair dye compositions generally comprise at least two separately packaged components. In addition to the time required to efficiently mix these components, the mixing process itself can be both complicated as it can result in waste and cause greater convenience to the user. Therefore, it would be desirable to develop a convenient and easy-to-use method for delivering oxidative compositions of hair dye, which does not require mixing of the dye and oxidant components. It would also be desirable to develop a dye composition comprising an oxidizing agent and an oxidative agent for hair dye which can be stored as separately packaged, low pH, stable components which, when mixed, provide a low pH, storage stable mixture. that is suitable for direct application to hair. The low pH mixture can be stored and reused. This would allow the consumer to correct errors, make adjustments to the roots or re-apply the product without having to buy it again. It has been found that low pH mixtures of agents. Oxidants and hair dye oxidation agents can be packaged together, in a single package, and stored with stability and can be reused. It has also been found that these mixtures of low pH of oxidizing agent and oxidative agent for hair dye provide improved initial hair color attributes against conventional high pH compositions. It has been found that low pH mixtures of oxidizing agents and oxidative hair dyeing agents, which have been stored at room temperature, provide a better potential for color development in relation to P838 dye compositions of conventional type. It has also been found that, below pH, both the oxidizing agent and the hair dye oxidation agents are stable over time and can be stored that way. It is an object of the present invention to provide hair dye compositions comprising oxidizing and oxidizing hair dyeing agents, packaged separately, which remain stable at low pH, both, when stored individually or when mixed, and having excellent characteristics of initial hair dye and / or color retention potential. A further object of the present invention is to provide low pH hair dye compositions comprising both oxidizing and formerly hair dye oxidation agents, which are packaged in a single package and / or are reusable and have rapid action. , they are easy to use and stable to storage. It has been found that the above objects can be met with the low pH, storage stable, reusable hair dye compositions of the present invention. All percentages are given by weight of the final compositions in the form intended to be used P838 unless otherwise specified.

SUMMARY OF THE INVENTION The object of the present invention is a hair coloring composition suitable for the treatment of human or animal hair. According to one aspect of the present invention, reusable, storage stable hair dye compositions are provided, comprising: (a) an oxidizing agent; and (b) a hair dye oxidative agent; wherein the pH of each of (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 5, and wherein both (a) and (b) are capable of being stored at low pH, either separately or, once mixed, for at least one month at room temperature, and wherein the resulting color administered at hair (Delta E) is up to about 75%, preferably up to about 85%, more preferably up to about 90% and more preferably up to about 95% of the total color administered to the hair (Delta E) from a mixture of (a) and (b) during mixing. It should be understood that the percentages by weight of the components of the composition that are expressed herein are given in terms of the total composition and include the composition when in the intended use form. According to a further aspect of the present invention there is provided: A method of hair dyeing, wherein the dye mixture is present in a single container suitable for direct application to the hair wherein the hair dye mixture comprises: ( a) an oxidizing agent; and (b) a hair dye oxidative agent; wherein the combined mixture of (a) and (b) has a pH in the range of between about 1 to about 5 and wherein the resulting color supplied to the hair (Delta E), after at least 1 month of storage at ambient temperature, is up to about 75%, preferably up to about 85%, more preferably up to about 90% and still more preferably up to about 95% of the color supplied to the hair (Delta E) from a mixture of (a ) and (b) in the first mixing. According to a further object of the present invention there is provided a hair dye composition comprising: (a) an oxidizing agent; and (b) a hair dye oxidative agent; wherein the pH of each of (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 5, wherein (a) as (b) are in the form of intended use and wherein the molar level of (a) is from about 0.0003 moles (per lOOg of the composition) to less than about 0.2 moles (per lOOg of composition) and where both (a) and (b) are capable of being stored at low pH, either separately or, once mixed and wherein the resulting color supplied to the hair (Delta E) after at least about 1 month of storage, is up to about 75%, preferably up to about 85%, with greater preference of up to about 90% and still more preferably up to about 95% of the total color administered to the hair (Delta E) from a mixture of (a) and (b) during mixing. According to still another aspect of the present invention, there is provided a method for dyeing the hair, wherein a hair dye composition is present as components (a) and (b) packaged separately and wherein the compositions of Hair dye comprises: (a) from about 0.0003 moles (per lOOg of composition) to less than about 0.2 moles (per lOOg of the composition) of an oxidizing agent, wherein the pH of (a) is in the range from about 1 to about ß; and (b) a hair dye oxidative agent wherein the pH of (b) is in the range of about 1 to about 6; wherein each of (a) and (b), when in the form of the intended use, are stable at pH 's in the range of about 1 to about 6 and wherein the mixture of hair dye combined with ( a) and (b) is stable over time and has a pH in the range of about 1 to about 5, and wherein the resulting color delivered to the hair (Delta E) after at least about 1 month of storage at room temperature, it is up to about 75%, preferably up to about 85%, more preferably up to about 90% and still more preferably up to about 95% of the total color delivered to the hair (Delta E) from a mixture P838 (a) and (b) after 1 hour of storage.

DETAILED DESCRIPTION OF THE INVENTION In the sense used herein, "hair" to be treated can refer to "live" hair, that is to say in a living body or it can be "non-living" hair, that is to say in a wig, hairpiece or other aggregation of hair. non-living fibers, for example those used in textiles and fabrics. SE mammal hair is preferred, preferably human hair. However, wool fibers, animal skins and other fibers containing melanin are suitable as substrates for the compositions according to the present invention. In the sense used herein the term "hair staining composition" is used in the sense. broad since it is intended to encompass compositions containing the combinations herein of a low pH mixture (from about 1 to about 5) of an oxidizing agent and an oxidative coloring agent. In addition, it is also intended to include complex compositions containing other components that may or may not be active ingredients. Therefore, the term "dye composition or hair dyeing" is intended to be applied to compositions containing, in addition to a mixture of active oxidizing agent and oxidative dyeing agents, other components, such as, for example, auxiliaries P838 oxidants, sequestrants, stabilizers, thickeners, regular pH, postadores, surfactants, solvents, antioxidants, polymers, non-oxidative dyes and conditioners. As mentioned above, the low pH, storage stable and / or reusable hair dye compositions according to the present invention comprise an oxidizing agent (a) which is either separately or in combination with a hair dye oxidative agent (b), wherein each of (a) and b) when in the form of intended use, are stable to storage at pHs in the range of about pH 1 to about pH 6 and where the combined mixture of (a) and (b) is stable to storage in the pH range of about 1 to about 6. Preferably, the pH of either of (a) and / or (b) is in the range of about 1.5 to about 5.8, more preferably from about 1.8 to about 5.5, more preferably from about 2 to about 5 and especially from about 3.5 to about 4.5, and wherein the preferred pH of the combined mixture of (a) and ( b) is e n the range from about 1.5 to about 5, more preferably from about 1.8 to about 4.7, still with greater preference of PS38 about 2 to about 4.6, especially about 2.5 to about 4.5 and more especially about 2.7 to about 3.8.

Dye Oxidation Processes Hair Coloring Those skilled in the art are understood to successfully color human or animal hair with oxidative dyes in general, it is necessary to treat the hair with a mixture of oxidizing agent or oxidative coloring agent of the hair. As already mentioned before, the most common oxidizing agent is hydrogen peroxide. The hydrogen peroxide has a pKa in the range of about 11.2 to about 11.6 and, as such is understood, it is generally used as an agent. dye oxidant at pHs in the range of about 9 to about 12. Surprisingly, it has been found that, at a low pH, oxidative, reusable and / or storage stable hair dye compositions can be developed. In addition, it has been found that improved hair dyeing characteristics such as for example initial color development and improved color fastness to washing, are provided by oxidative, reusable and / or storage stable hair dye compositions, of low pH, P838 of the present invention, at pHs ranging from about pH 1 to about pH 5, preferably from about pH 1.5 to about pH 5, more preferably from about pH 1.8 to about pH 4.7, still more preferably from about pH 2 to about pH 4.6, and especially about pH 2.5 to about pH 4.5 and more specifically 2.7 to 3.8.

Compositions d Stable Color, dS Low pH, Storage Stable The compositions according to the present invention comprise as an essential characteristic an oxidizing agent and an oxidative dyeing agent for hair at a low pH, wherein both the oxidizing agent component and the oxidative component of hair dyeing are present, when in the form of the intended use, at a pH in the range of from about pH to about pH 6 and wherein the combined mixture of the oxidizing agent and the dye oxidative agent for the hair has a pH in the range of about pH 1 to about pH 5. As described above, the mixture of the individual components both oxidant and temp P838 hair for the dye compositions of the present invention, have improved storage stability under low pH conditions (approximately pH 1 to pH 5) compared to conventional high pH dye compositions. Furthermore, it has been found that oxidative hair dyeing agents can be stored separately, at a low pH and mixed with oxidizing agents at a low pH, to form reusable, storage stable hair dye compositions. Storage stable hair dye compositions, as defined herein, include a dye composition comprising an oxidizing component and an oxidative component of hair dye, which, once blended, retain the ability to develop an initial color to the hair. hair with assistant / predictable, both immediately after mixing and after storage over time. Also defined herein as storage stable hair dye compositions are single component dye compositions which are suitable for direct application to hair, comprising a premixed combination of oxidizing agent and hair dye oxidative agent. In terms of consumer perception, the initial consistent / predictable color refers to the fact that P838 color supplied to the hair, for the stored composition (stored Delta E) is not visibly different from the color supplied by the composition of the formulation (first mixing the oxidizing agent and the oxidative staining agent) and / or at the point of purchase ( when sold as a mixture of a single component). The initial color of the hair as well as the color of the hair after storage, as will be explained in detail below, can be measured in terms of Delta E (Delta E white, Delta E stored). The retained potential of color development, as defined herein, refers to the color developed by the hair dye composition at the first application (Delta E white) which is substantially administered to the hair after a prolonged period of storage of the composition . In the compositions according to the present invention, the color administered to the hair after at least about 1 hour (60 minutes) of storage (Delta E stored) at room temperature (25 ° C) is greater than about 75%, of preference greater than about 80%, more preferably greater than about 85%, still more preferably greater than about 90% and especially greater than about 95% of the color administered to the hair at the first application (Delta E white).

P838 In the preferred compositions according to the present invention, the color administered to the hair at least 1 day (24 hours) of storage (Delta E stored) at room temperature (25 ° C) is greater than about 75%, of preference greater than about 80%, more preferably greater than about 85%, still more preferably greater than about 90% and especially greater than about 95% of the color administered to the hair at the first application (Delta E white). In the compositions more preferably according to the present invention, the color administered to the hair after at least about 1 month (720 hours) of storage (Delta E stored) at room temperature (25 ° C) is greater than about 75%, preferably greater than about 80%, with greater preference greater than about 85%, still more preferably greater than about 90% and especially greater than about 95% of the color administered to the hair at the first application (Delta E white). According to one aspect of the present invention, a reusable, storage stable, hair dye composition is provided, comprising: (a) an oxidizing agent; and (b) a hair dye oxidative agent; P838 wherein the pH of each of (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 5 and wherein both (a) and (b) are capable of being stored at a low pH, either separately or once mixed for at least about 1 month and wherein the resulting dye administered to the hair (Delta E storage) is greater than about 75%, preferably greater than about 85%, more preferably greater than about 90% and still more preferably greater than about 95% of the total color delivered to the hair (Delta E white) from one mixture of (a) and (b) in the mixing. It is generally accepted that the pH within the strand of human hair is around pH 5.5 to pH 6 (CR Robbins, Chemical and Physical Behavior of Human Hair, 2nd Ed. Pl57) and that human hair has an inherent regulatory capacity of pH. It is known that certain oxidizing agents, for example hydrogen peroxide, are storage stable at about pH 4. Although it is not desired to be limited by a particular theory, it is believed that at pHs in the range of about 1 to about 5, preferably in the range of about 1.5 to about 5, with greater P838 preferably in the range of from about 1.8 to about 4.7, more preferably from about 2 to about 4.6, especially from about 2.5 to about 4.5 and especially from about 2.7 to about 3.8, the oxidative coupling regime between the oxidizing agent and the Oxidative agents of hair dye is relatively slow. Thus, it is proposed here that, at a low pH, mixtures of hair dye oxidative agent and oxidizing agents can be stored stably without significant impact on the color development potential of the resulting hair dye composition. . The low-pH, reusable, oxidative hair dye compositions in a single package of this invention are also suitable for use in a multi-application format (i.e. the consumer may use a single package for several color applications in the course of of time) that provides the consumer with the ability to reuse the mixed dye composition for error correction, touch-ups or root coverage, future hair re-coloration with the same product / color and / or tests on locks or in small areas of the hair. hair. By in a single package, as defined herein, it refers to a hair dye composition comprising a component in a P838 only container, which contains there an oxidizing agent and an oxidative staining agent, together, in a stable mixture and low pH.

Components Parts of the Hair Dye Compositions. As detailed below, it has been found that oxidative hair dye materials can be stored at low pH with excellent retained potential for color development. As defined herein, retained coloring potential for the oxidative component of dye (b) refers to the color, as developed by mixing the oxidative component of hair dye (b) with the oxidizing agent (a), in Zero time (ie White Delta E) is approximately equivalent to color as it develops with the mixture of the oxidative component of hair dye (b) and the oxidizing agent (a) after a period of storage (Delta E stored ) at room temperature, 25 ° C for X hours. In the preferred compositions according to the present invention, Delta E (X hours) is greater than about 90%, preferably greater than about 93%, more preferably greater than about 95% and still with greater preference greater P838 of approximately 98% Delta E (white). Therefore, according to another aspect of the present invention there is provided a reusable, storage stable hair dye composition comprising: (a) an oxidizing agent; and (b) a hair dye oxidative agent; wherein the pH of each of (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 5 and wherein both (a) and (b) are capable of being stored at a low pH, at room temperature (about 25 ° C) either separately or once mixed, for at least 1 month, and wherein the color potential administered to the hair (Delta E) is greater than about 75%, preferably greater than about 85%, more preferably greater than about 90% and still more preferably greater than about 95% of the total color administered to the hair (Delta E) from a mixture of (a) and (b) in the mixing.

Oxidizing Agents The compositions of the invention comprise P838 an essential characteristic of at least one oxidizing agent. The oxidizing agent must be safe and effective for use in the compositions herein. Preferably, suitable oxidizing agents that are used herein will be soluble in the compositions according to the present invention, when in liquid form and / or in the form intended for use. Preferably, suitable oxidizing agents that are used herein will be soluble in water. The water-soluble oxidizing agents defined herein refer to agents having a solubility in the degree of about 10Og in 10000ml of deionized water at 25 ° C ("Chemistry" CE Mortimer, 5th Edn., P277). Suitable oxidizing agents that are used herein are selected from inorganic peroxygen oxidizing agents, preformed organic peroxyacid oxidizing agents and organic peroxide oxidizing agents or mixtures thereof.

Inorganic Oxidizing Agents The compositions of the invention comprise at least one inorganic oxidizing agent (hereinafter referred to as "inorganic peroxygen oxidizing agent"). The inorganic peroxygen oxidizing agent must be safe and effective for use in compositions of the P838 present. Preferably, the inorganic peroxygen oxidizing agents suitable for use herein will be soluble in the compositions according to the present invention when they are in liquid form and / or in the form intended for use. Preferably, the inorganic peroxygen oxidizing agents suitable for use herein will be soluble in water. Water-soluble inorganic peroxygen oxidizing agents as defined herein refer to agents having a solubility in a degree of about 10 g in 100 ml of deionized water at 25 ° C ("Chemistry" CE Mortimer, 5th Edn. P277 ). The inorganic peroxygen oxidizing agents useful herein are in general inorganic peroxygen materials capable of providing peroxide in an aqueous solution. Inorganic peroxygen oxidizing agents are well known in the art and include hydrogen peroxide, inorganic alkali metal peroxides such as for example sodium periodate, sodium perbromate and sodium peroxide, and inorganic salt oxidant perhydrate compounds, for example salts alkali metal of perborates, percarbonates, perfosphates, persilicates, persulfates and the like. These inorganic salts of perhydrate can be incorporated as monohydrates, tetrahydrates, etc. Mixtures of two or more P838 of these inorganic peroxygen oxidizing agents may be useful if desired. While the iodates and alkali metal bromates are suitable for use herein, bromates are preferred. The use in the compositions according to the present invention of hydrogen peroxide is to a large extent preferred. It has been found that, under the conditions of low pH according to the present invention, it is possible to provide both improved initial color development and color consistency, color fastness to washing and color intensity against high pH systems of type conventional (using equivalent levels of peroxide and dyes) and also color equivalent development (below detailed in the section of Experimental Data in terms of Delta E) against conventional systems at high pH, while using substantially less amount of oxidizing agent of inorganic peroxygen (up to 75% less) as well as providing color development equivalent to what is obtained by conventional high pH systems, while substantially less oxidative hair coloring agents (up to 50% less) are used. Therefore, the storage stable and / or reusable low pH hair coloring compositions according to the invention can be formulated to reduce the level of P838 damage to the hair and levels of staining and irritation of the skin. In addition, as the low pH storage stable and / or reusable hair coloring compositions according to the present invention can be formulated without ammonia, there is no ammonia related odor or skin irritation which are negative aspects associated with these compositions. The inorganic peroxygen oxidizing agent, when present, is found in the compositions according to the invention at a molar level of about 0.0003 mole (per lOOg of composition) to less than about 0.2 mole (per lOOg of composition), Preferably, the inorganic peroxygen oxidizing agent is present at a molar level from about 0.006 moles to about 0.15 moles, more preferably from about 0.009 moles to about 0.12 moles, more preferably from about 0.012 moles to about 0.1 from about 0.015 moles a approximately 0.09 moles (per lOOg of the composition). The inorganic peroxygen oxidizing agent, when present, is present in the compositions of this invention at a level of from about 0.01% to about 6%, preferably from about 0.01% to about 5%, most preferably from P838 about 0.2% to about 4%, still more preferably from about 0.3% to about 3% and especially from about 0.05% to about 2% by weight.

Preformed Organic Peroxyacid The compositions according to this invention may contain one or more preformed organic peroxyacid oxidizing agents. Suitable organic peroxyacid oxidizing agents which are used in the dye or dye compositions of the invention in the following formula: R - C (O) OOH wherein R is selected from unsubstituted saturated or unsaturated, substituted straight or branched alkyl, aryl, or alkaryl groups of 1 to 14 carbon atoms. A class of suitable organic peroxyacid compounds that are used herein are the amide substituted compounds of the following general formula: R1-C-N-R2-C-OOH R1-N-C-R2-C-OOH II I, II! II II O R O or O O P838 wherein R1 is an alkyl or alkaryl group, or an aryl group, having 1 to 14 carbon atoms. R 2 is a saturated or unsaturated alkyl or alkaryl group, or an aryl group, having 1 to 14 carbon atoms, and R 5 is H or a saturated or unsaturated alkyl or alkaryl group, or an aryl group, having 1 to 10 carbon atoms. An amide-substituted organic peroxyacid compound of this type is disclosed in EP-A-0,170,386. Other suitable organic peroxyacid oxidizing agents include peracetic acid, pernanoic, nonilamidoperoxycarpoic acid (NAPCA), perbenzoic, perbenzoic, m-chloroperbenzoic, di-peroxy-isoptalic, pono-peroxyphthalic, peroxylauric, hexanesulfonyl peroxy propionic, N, N-phthaloylamino peroxycaproic, monoper succinic, nonanoyloxybenzoic, dodecanediolyl-monoperoxybenzoic, peroxyadipic acid nonyliamide, diacyl and tetraacylperoxides, especially diperoxydecanedioic acid, diperoxytetradecanedioic acid and deoxyhexadecanedioic acid and derivatives thereof. Mono and diperazelaic acid, mono and diperbrasyl acid and N-phthaloylaminoperoxycaproic acid and derivatives thereof are also used here. Preferred peroxyacid materials suitable for use herein are selected from peracetic and pernanoic acid and mixtures thereof.

P838 The preformed organic peroxyacid oxidizing agents must be safe and effective in their use in the compositions. Preferably, the preformed organic peroxyacid oxidizing agents to be used herein will be soluble in the compositions according to the present invention when they are in the liquid form and in the form they are intended to be used. Preferably, the preformed peroxyacid oxidizing agents suitable for use herein will be soluble in water. Preformed organic peroxyacid oxidizing agents that are soluble in water are defined herein as agents having a solubility in the range of about 10Og in 100OOml in deionized water to 252C ("Chemistry" CE., 5th Edn. P277). The preformed organic peroxyacid oxidizing agent, when present, is present at a molar level of from about 0.0013 moles to about 0.105 moles (per lOOg of the composition), more preferably from about 0.0013 moles to about 0.05 moles, most preferably from about 0.002 moles to about 0.04 moles and especially about 0.004 to about 0.03 moles (per 100g) of the hair dye composition according to the present invention. The oxidizing agent of organic peroxyacid P838 preformed, preferably present at a level of from about 0.01% to about 8%, more preferably from about 0.1% to about 6%, still more preferably from about 0.2% to about 4%, and especially about 0.3% to about 3% by weight of the hair dye composition. The weight ratio of the inorganic peroxygen oxidizing agent to the preformed peroxyorganic acid is preferably in the range of about 0.0125: 1 to about 500: 1, more preferably 0.0125: 1 to about 50: 1. The addition of the preformed organic peroxy acid oxidizing agents and the inorganic peroxygen oxidizing agents suitable for use herein, in the compositions of the present invention, comprises additional organic peroxides such as urea peroxide, melanin peroxide and mixtures thereof. The level of peroxide, when present, is between about 0.01% to about 3%, preferably between about 0.01% to about 2%, more preferably about 0.1% to about 1.5% and still more preferably about 0.2% to about 1% by weight of the composition.

P838 Hair Dyeing Once the hair has been dyed there is a desire for the color to be resistant to fading, which is caused by washing (characteristic also known as color fastness to washing), to perspiration, to dew. of hair and other external factors such as the action of the sun and also that the color is retained in a consistent manner for a predictable period of time. The additional damage to the hair can lead to an irregular absorption of dye as discussed above, can lead to a greater fading of the damaged portions of the hair and, consequently, to irregular levels of color fading over time. An additional difficulty commonly associated with human hair staining is the need for dyeing systems that avoid any adverse effect on the wearer's hair and skin, for example brittle hair or skin irritation or skin staining (staining). Therefore, it would be desirable to develop a hair dye composition that exhibits reduced fading, provides better washout resistance during a regular cleaning regime, can provide an essentially consistent hair color throughout the hair, with a minor irritant effect on the hair. the P838 skin, and that can reduce the staining of the skin, with less adverse effects on the user's hair. It has been found that the combination of oxidizing agent with one or more oxidative hair dyeing agents at a pH below the internal pH of the hair, between about 1 and about 5, in the hair dye compositions can deliver an excellent color initial to the hair in combination with better characteristics of color and solidity of the color in front of the wash, in the course of the time, desirable saturation of the color and attributes of vivacity, reduced damage to the hair, minor irritation of the skin, minor staining of the skin and a more efficient dyeing In addition, it has been found that the color development efficiency (color change) of the oxidizing agent and oxidative hair dyeing agents improves under the low pH conditions of the present invention. Furthermore, it has been found that the hair dye compositions according to the present invention can administer these excellent hair dye attributes resulting in minimal hair damage, at a low pH (from about 1 to about 6) . An object of the present invention is to provide low pH, reusable, storage stable hair coloring compositions which P83S manage the combination of improved hair dye attributes such as longer color duration (less fading), initial color generation, greater color absorption and color consistency in all types of hair. Hair types as defined herein refer to hair in different conditions and at different ages, ie untreated virgin hair, gray hair, permed hair, discolored hair, etc. Yet another object of the present invention is to provide low pH, reusable, storage stable hair dye compositions having reduced levels of skin irritation and / or skin staining compared to conventional high-stain systems. pH and that they impart a minimum damage to the fibers of the hair and a reduced staining of the skin in combination with an acceptable odor. Still another object of the present invention is to provide low pH, reusable, storage stable hair dye compositions exhibiting greater efficacy (improved color development). The color development that is defined here refers to the change in hair color, expressed in terms of Delta E, as defined in the Experimental section below. Still another objective of this P838 invention is to provide dye compositions with reduced damage to the skin and / or hair, which can deliver an equivalent color development (as compared to conventional high pH systems) in combination with improved color fastness to washing and consistency of improved color while less dye and / or less oxidizing agent is used.

Hair Coloring or Dyeing Agents The low pH hair coloring compositions of this invention include as an essential characteristic an oxidative hair coloring agent. These oxidative coloring agents are used in combination with the oxidant systems of the present invention to formulate hair dye compositions of low pH of permanent, demi-permanent, semi-permanent or temporary type. Permanent hair dye compositions are defined herein as compositions that once applied to the hair are essentially resistant to washing. Demi-permanent hair dye compositions are defined herein as those that are substantially removed from the hair after 24 washes. The semi-permanent hair dye compositions as defined herein are compositions that once applied P838 to the hair is removed substantially from this after up to 10 washes. Temporary hair dye compositions defined herein are compositions that once applied to the hair are essentially removed from it after up to 2 washes. The different types of hair dye compositions can be formulated by specific combination of oxidants and / or dyes at different proportions and levels. Wiping, as described here, is the process by which hair color is removed from the hair over time during the normal hair-cleaning regime. Solidity versus washing as defined herein, refers to the resistance to washout of dyed hair. The fastness to washing as described herein can be measured in terms of the relative color change in the dyed hair (Delta E) with respect to several washes (shampoo). The substantial removal of dye from the hair as defined herein refers to the color change in the dyed hair (Delta E) which is greater than about 2 after 10 washes. The concentration of each hair oxidative coloring agent in the low pH coloring compositions according to the invention is from about 0.001% to about 3% by weight and preferably from about 0.01% to about 2% by weight.

P838 The total combined level of the oxidative hair coloring agents in the compositions according to the invention is between about 0.001% to about 5%, preferably from about 0.01% to about 4%, more preferably about 0.1% to about 3%, still more preferably from about 0.1% to about 1% by weight. Typically, conventional hair dye compositions have a total level of oxidative coloring agent present in the composition in the range of about 0.2% to about 3.5% by weight. Accordingly, the compositions according to the invention can exhibit improved attributes of hair dyeing such as initial color development and initial color consistency in combination with improved fastness to washing over time, when compared to systems conventional high pH that have similar levels of dye. The color consistency, in the sense used here, refers both to the relative ability to predict the initial color and to the improved color retention over time through different hair types. The effectiveness of oxidative dyes improves at a low pH so that the compositions herein P838 invention are valuable for supplying colors with a very high intensity (dark colors) with reduced levels of dye. In particular, the good results of hair dye in combination with the equivalent development of color (against high pH systems) can be achieved by using the inorganic peroxygen oxidizing agents of the present invention and substantially less dye against hair dye compositions of high pH conventional type. Therefore, according to a further aspect of the present invention, there is provided a dye composition comprising: (a) an oxidizing agent; (b) an oxidative hair coloring agent; Y . (c) a suitable diluent to be applied to the hair; wherein the pH of each of (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 5 and wherein both (a) and (b) are capable of being stored at low pH, either separately or once mixed, for at least about 1 month at room temperature and where the resulting color is delivered to the hair ( Delta E) is greater than approximately 75%, preferably greater than P838 about 85%, more preferably greater than about 90% and still more preferably greater than about 95% of the total color administered to the hair (Delta E white) from a mixture of (a) and (b), during the mixed. As described above, it has been found that the combination of oxidizing agents with oxidative hair coloring agents at a low pH is valuable in providing excellent attributes of hair ink in combination with reduced levels of hair damage, skin irritation and staining of the skin, in combination with an improved odor profile (with respect to conventional high pH compositions) An additional benefit of the low pH colorations according to this invention is that there are reduced levels of skin staining with these compositions in relation to what is presented with conventional high pH compositions. Therefore, in accordance with still another aspect of the present invention, there is provided a hair coloring composition capable of providing a light brown to light brown color having 40% gray, comprising: (a) an oxidizing agent; (b) an oxidative hair coloring agent; and (c) a suitable diluent to be applied to the hair; wherein the pH of each of the components (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of between about 1 and approximately 5 and wherein both (a) and (b) are capable of being stored at low pH, either separately or once mixed, for at least about 1 month at room temperature and where the change in the Level of staining of the skin after application of the product (Delta E) is less than about 4, preferably less than about 3, less preferably about 2.7. Light brown hair that has 430% gray coverage is defined in terms of the L, a, b values with an "L" value in the range of between 35 to about 37, and an "a" value in the range of about 4.5 to about 5.5 and a "b" value in the range of about 11.5 to about 12.7. Without being limited by any particular theory, it is considered that these improvements (in relation to less irritation and / or staining of the skin) result from the combination of (a) reduced levels of dyes and low pH; (b) the reduction of paraphenyl diamine (PPD) by contact sensitization below pH (high levels of PPD have been shown to develop contact sensitization in P838 high pH but not at low pH); (c) elimination of the formation of nitrobenzene contact sensitizers (which may occur in high pH compositions); (d) reduced levels of skin staining at low pH against those obtained at high pH, and; (e) reduction of skin irritation and negative odors as a result of ammonia removal and the use of alternative oxidizing agents in low pH dyeing compositions, according to the present invention.

Oxidative Hair Coloring Processes Any hair oxidative coloring agent can be used in the compositions of the present invention. Typically, without intending to be limited thereby, the hair oxidative coloring agents consist essentially of at least two components, collectively referred to as dye-forming intermediates (or precursors). The dye-forming intermediates can react in the presence of a suitable oxidant to form a suitable molecule. The dye-forming intermediates used in oxidative dyes for hair include: aromatic diamines, amonophenols, various heterocyclics, phenols, naphthols and their derivatives. These dye-forming intermediates can be broadly classified as: primary intermediates and secondary intermediates. The primary intermediaries, which are also known as oxidative dye precursors, are chemical compounds that have been activated with oxidation and which then react with each other and / or with copulants to form colored dye complexes. Secondary intermediates, also known as couplers or color modifiers, are generally colorless molecules that can form colors in the presence of activated precursors / primary intermediates, and are used with other intermediates to generate specific color effects or to stabilize the color. Suitable primary intermediates which are used in the compositions and processes herein include: aromatic diamines, polyhydric phenols, amino phenols and derivatives of these aromatic compounds (for example N-substituted derivatives of the amines and ethers of the phenols). These primary intermediates are generally colorless molecules prior to oxidation. Although it is not desired to be limited by any particular theory, it is proposed here that the processes by which the color is generated from the primary intermediates and the coupling compounds Secondary P838 generally includes a step-by-step sequence by which the primary intermediate can be activated (by oxidation), and then joins with a copulant to give a colored, conjugated, dimeric species, which in turn can bind with another intermediate primary "activated" to produce a colored, conjugated, trimeric molecule.

Chemistry of Oxidative Hair Coloration Through pH While not wishing to be limited to any particular theory, it is generally understood that conventional oxidative dyeing typically occurs between oxidative precursor molecules, oxidative coupling molecules and an agent peroxygen oxidant at a high pH (8 to 10). Typical precursors include 1,4-disubstituted benzene derivatives and typical couplers including 1,2 or 1,3-disubstituted benzene derivatives. It is generally accepted that the pH within the hair strand, human, is between pH 5.5 to pH 6 (CR Robbins, Chemical and Physical Behavior of Human Hair, 2nd, De. Pl57), and that hair has an inherent buffering capacity of pH in this pH range. Surprisingly, it has been found that oxidative hair coloring at a pH of 6 or less with P838 oxidizing agents, at a molar level of between about 0.000294 moles (per lOOg of composition) to less than about 0.0883 moles (per 100g of composition), and an oxidative hair coloring agent, are valuable for providing excellent initial color to the hair. hair in combination with improved color and color fastness over time, desirable color saturation and vividness attributes, less hair damage, less skin irritation and less skin staining as well as dyed more efficient. In addition, it has been found that the color development efficiency (ie, greater color change) from the inorganic peroxygen oxidizing agents and the oxidative coloring agents for the hair of the present invention, improves under a low pH condition. according to the present invention. In addition, it has been found that hair dye compositions at low pH according to the invention can provide these excellent hair coloring attributes with a minimum of damage thereto. It has been found that at pH levels less than 6, preferably pH from 1.5 to about 5, more preferably between pH 1.8 to about 4.7, more preferably between 2 to about 4.6, especially between 2.5 to about 4.5 and more especially between 2.7 to approximately 3.8, further improvements are achieved in P838 the development of color.

Dye Precursors or Oxidative Dye In general terms, the primary intermediates of oxidative dye include those monomeric materials that, during oxidation, form oligomers or polymers that have extended conjugated systems of electrons in their molecular structure. Due to the new electronic structure, the oligomers and polymers exhibit a shift in their electronic spectra towards the visible range and appear colored. For example, oxidative primary intermediates capable of forming colored polymers include materials such as aniline, which have a single functional group, and which, during oxidation, form a series of conjugated imines and trimers, quinoid dimers, etc., which vary in color from green to black. Compounds such as p-phenylenediamine, which has two functional groups, are capable of oxidative polymerization to provide colored materials of high molecular weight having an extended colored electron system. The oxidative dyes known in the art can be used in low pH compositions according to the present invention. A representative list of primary intermediaries and secondary copulators suitable for P838 used in the present are in Sagarin, "Cosmetic Science and Technology". Interscience, Special De. Vol. 2 pages 308-310. It is understood that the primary intermediaries detailed below are given only by way of examples and are not intended to limit the compositions and processes herein. Typical aromatic diamines, polyhydric phenols, amino-phenols and derivatives thereof, which are described above as primary intermediates may also have additional substituents on the aromatic ring, for example halogen, aldehyde, carboxylic acid, nitro, sulfonic acid and groups of substituted and unsubstituted hydrocarbons, as well as other substituents of amino nitrogen and phenolic oxygen, for example substituted and unsubstituted alkyl and aryl groups. Examples of aromatic diamines, amino phenols, polyhydric phenols and suitable derivatives thereof, respectively, are compounds having the following general formulas (I), (II) and (III): P838 or wherein Y is hydrogen, halogen, (eg, fluorine, chlorine, bromine or iodine), nitro, amino, hydroxyl.

-COOM or -S03M (wherein M is hydrogen or an alkali metal or alkaline earth metal, ammonium, or substituted ammonium wherein one or more hydrogen of the ammonium ion is replaced with alkyl radical or hydroxyalkyls of 1 to 3 carbon atoms), wherein R1, R,, R3 and R ^ are the same or different from each other and are selected from the group consisting of P838 hydrogen, C1 to C4 alkyl or alkenyl and C6 to C9 aryl, alkaryl or alkenyl, and R5 is substituted or unsubstituted hydrogen, alkyl or alkenyl of C1 to C4, wherein the substituents are selected from those designated as Y, previously or substituted or unsubstituted aryl, alkeryl or arachyl of C6 to C9, wherein the substituents are selected from those designated as Y, above. As the precursors of formula (I) are amines, these can be used here in the form of peroxide-compatible salts, as mentioned, wherein X represents peroxide-compatible anions of the type detailed above. The general formula of the salt indicated should be understood to encompass those salts having mono, di and tri-negative anions. Specific examples of the formula (I) are: o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, 2-chloro-p-phenylenediamine, 2-iodo-p-phenylenediamine, 4-nitro-o-phenylenediamine, 2-nitro -p-phenylenediamine, 1,3,5-triaminobenzoic acid, 2-hydroxy-p-phenylenediamine, 2,4-diaminobenzoic acid, sodium 2,4-diaminobenzoate, calcium 2,4-diaminobenzoate, di-2,4-diaminobenzoate , 2,4-diaminobenzoate ammonium, 4-diaminobenzoate trimethylamine, 2,4-diaminobenzoate tri- (2-hydroxyethyl) aminium, 2,4-carbonate carbonate diaminobenzaldehyde, 2,4-diaminobenzenesulfonic acid, 2,4 P838 potassium diaminobenzenesulfonate, N, N-diisopropyl-p-phenylenediamine bicarbonate, N,? -dimethyl-p-phenylenediamine,? -ethyl-? - (2-propenyl) -p-phenylenediamine,? -phenyl-p-phenylenediamine,? -phenyl-β-benzyl-p-phenylenediamine,? -ethyl-? - (3-ethylphenyl) -p-phenylenediamine, 2,4-toluenediamine, 2-ethyl-p-phenylenediamine, 2- (2-bromoethyl) -p-phenylenediamine, 2-phenyl-p-phenylenediamine laurate, 4- ( 2, 5-diaminophenyl) benzaldehyde, 2-benzyl-p-phenylenediamine acetate, 2- (4-nitrobenzyl) -p-phenylenediamine, 2- (4-methylphenyl) -p-phenylenediamine, 2- (2, 5- diaminophenyl) -5-methylbenzoic acid, metroxiparafenylene diamine, dimethyl-p-phenylenediamine, 2,5-dimethyl para-phenylenediamine, 2-methyl-5-methoxy-para-phenylenediamine, 2,6-methyl-5-methoxy-para-phenylenediamine, 3 -methyl-4-amino-?,? - diethylaniline,?,? -bis (β-hydroxyethyl) -para-phenylenediamine, 3-methyl-4-amino- ?, -bis (β-hydroxyethyl) aniline, 3-chloro -4-amino- ?,? -bis (ß-hydroxyethyl) aniline, 4-amino -? - ethyl -? - (carbamethyl) aniline, 3-metuk-4-amino -? - ethyl -? - (carbamethyl) aniline , 4-amino -? - ethyl- (ß-piperidonoethyl) aniline, 3-methyl-4-amino -? - ethyl- (? -piperidonoethyl) aniline, 4-amino -? - ethyl -? - (? - morpholinoethyl) aniline, 3-methyl-4-amino -? - ethyl -? - (? - mesylaminoethyl) aniline, 4-amino- ? -ethyl -? - (ß-sulfoethyl) aniline, 3-methyl-4-amino -? - ethyl -? - (? - sulfoethyl) aniline,? - (4-aminophenyl) morpholine,? - (4- P838 aminophenyl) piperidine, 2,3-dimethyl-p-phenylenediamine, isopropyl-p-phenylenediamine, N, N-bis- (2-hydroxyethyl) -p-phenylenediamine sulphate. or wherein X and Y are the same as in the formula (I), R1 and R2 may be the same or different from each other and are the same as in the formula (I). R5 is the same as in formula (I) and R6 is hydrogen or alkenyl or substituted or unsubstituted alkyl of C1 to C4, wherein the P838 substitutes are selected from those defined as Y in formula (I). Specific examples of compounds of the formula (II) are: o-aminophenol, m-aminophenol, p-aminophenol, 2-iodo-p-aminophenol, 2-nitro-p-aminophenol, 3,4-dihydroxyaniline, 3, 4 -diaminophenol, chloroacetate, 2-hydroxy-4-aminobenzoic acid, 2-hydroxy-4-aminobenzaldehyde, 3-amino-4-hydroxybenzenesulfonic acid, N, N-diisopropyl-p-aminophenol, N-methyl-N- (l-propenyl) -p-aminophenol, N-phenyl-N-benzyl-p-aminophenol sulfate, N-methyl-N- (3-ethylphenyl) -p-aminophenol, 2-nitro -5-ethyl-p-aminophenol, 2-nitro-5- (2-bromoethyl) -p-aminophenol, (2-hydroxy-5-aminophenyl) acetaldehyde, 2-methyl-p-aminophenyl, acid (2-hydroxy) 5-aminophenyl) acetic acid, 3- (2-hydroxy-5-aminophenyl) -1-propene, 3- (2-hydroxy-5-aminophenyl) -2-chloro-1-propene, 2-phenyl-p-aminophenol palmitate , 2- (4-nitrophenyl) -p-aminophenol, 2-benzyl-p-aminophenol, 2-benzyl-p-aminophenol, 2- (4-chlorobenzyl-p-aminophenol perchlorate, 2- (4-methylphenyl) -p -aminophenol, 2- (2-amino-4-methylphenyl) -p-aminophenol, p-methoxyaniline, 2-bromoethyl-4-aminophenyl ether phosphate, 2-nitroethyl-4-aminophenyl bromide ether, 2-aminoethyl ether -4-aminophenyl, 2-hydroxyethyl-4-aminophenyl ether, (4-aminophenoxy) acetaldehyde, (4-aminophenoxy) acetic acid, (4-aminophenoxy) methanesulfonic acid, isobutyrate ether 1- P838 propenyl-4-aminophenyl, (2-chloro) -l-propenyl-4-aminophenyl ether, (2-nitro) -l-propenyl-4-aminophenyl ether, (2-amino) -propenyl-4-ether -aminophenyl, (2-hydroxy) -l-propenyl-4-aminophenyl ether, N-methyl-p-aminophenol, 3-methyl-4-aminophenol, 2-chloro-4-aminophenol, 3-chloro-4-aminophenol , 2, 6-dimethyl-4-aminophenol, 3,5-dimethyl-4-aminophenol, 2,3-dimethyl-4-aminophenol, 2,5-dimethyl-4-aminophenol, 2-hydroxymethyl-4-aminophenol, 3 -hydroxymethyl-4-aminophenol. wherein Y, R5 and R6 are as defined above for formula (II). Specific examples of the compounds of the formula (III) are: o-hydroxyphenol (catechol), m-hydroxyphenol (resorcinol), p-hydroxyphenol (hydroquinone), 4-methoxyphenol, 2-methoxyphenol, 4- (2-chloroethoxy) phenol, 4- (2-propenoxy) phenol, 4- (3-chloro-2-propenoxy) phenol, 2-chloro-4-hydroxyphenol (2- P838 Chlorohydroquinone), 2-nitro-4-hydroxyphenol (2-nitrohydroquinone), 2-amino-4-hydroxyphenol, 1,2,3-trihydroxybenzene (pyrogallol), 2,4-dihydroxybenzaldehyde, 3,4-dihydroxybenzoic acid, acid 2,4-dihydroxybenzenesulfonic acid, 3-ethyl-4-hydroxyphenol, 3- (2-nitroethyl) -4-hydroxyphenol, 3- (2-propenyl) -4-hydroxyphenol, 3- (3-chloro-2-propenyl) - 4-hydroxyphenol, 2-phenyl-4-hydroxyphenol, 2- (4-chlorophenyl) -4-hydroxyphenol, 2-benzyl-4-hydroxyphenol, 2- (2-nitrophenyl) -4-hydroxyphenol, 2- (2-methylphenyl) ) -4-hydroxyphenol, 2- (2-methyl-4-chlorophenyl) -4-hydroxyphenol, 3-methoxy-hydroxy-benzaldehyde, 2-methoxy-4- (1-propenyl) phenol, 4-hydroxy-3 acid -methoxycinnamic acid, 2,5-dimethoxyaniline, 2-methylresorcinol, alpha naphthol and salts thereof. The secondary coupling compounds (color modifiers) such as those detailed below, are preferably used together with the primary intermediates herein and are thought to interpose themselves in the colored polymers during their formation and to cause displacements in the electronic spectra thereof. , resulting in slight changes in color. Secondary coupling compounds that are suitable for inclusion in the dyeing compositions and processes hereinbefore described, include certain P838 aromatic amines and phenols and derivatives thereof that do not produce a single color, but modify the color, tone or intensity of the colors developed by the primary oxidized dye intermediates. Certain aromatic amines and phenolic compounds and derivatives thereof include some aromatic diamines and polyhydric phenols of the types described by formulas (I), (II) and (III) above, but which are well known in the art as non-primary intermediates suitable, and here they are considered as suitable couplers. Polyhydric alcohols are also useful for use as copulants herein. The aromatic amines and phenols and derivatives that are described above as copulators may also have additional substituents on the aromatic ring, i.e. halogen, aldehyde, carboxylic acid, nitro, sulfonyl and substituted or unsubstituted by hydrocarbon groups, as well as additional substituents in the amino nitrogen or in the phenolic oxygen, for example substituted or unsubstituted alkyl or aryl groups. Once again, the peroxide-compatible salts thereof are suitable for use herein. Examples of aromatic amines, phenols and derivatives thereof are compounds of the following general formulas (IV) and (V): P838 or wherein Z is hydrogen, C1 and C3 alkyl, halogen (for example fluorine, chlorine, bromine or iodine) nitro, -CH -COOM or S03M, (wherein M is hydrogen or an alkali metal or alkaline earth metal, ammonium or substituted ammonium in P838 where one or more ammonium ion hydrogens are replaced with an alkyl or hydroxyalkyl radical of 1 to 3 carbon atoms), wherein R1 and R are the same or different and are selected from the group consisting of Cx to C4 alkyl or alkenyl and aril, C6 to C9 alkaryl or aralkyl and R7 is hydrogen. Alkyl or substituted or unsubstituted alkenyl of C1 to C4, wherein the substituents are selected from those designated as Z above or aryl, alkaryl or substituted or unsubstituted aralkyl from C6 to C9, wherein the substituents are selected from those defined as Z above and where X is as defined in formula (I). Specific examples of the compounds of the formula (IV) are: aniline, p-chloroaniline, p-fluoroaniline, p-nitroaniline, p-aminobenzaldehyde, p-aminobenzoic acid, sodium p-aminobenzoate, lithium p-aminobenzoate, calcium-p-aminobenzoate, ammonium p-aminobenzoate, trimethylammonium p-aminobenzoate, tri (2-hydroxyethyl) -p-aminobenzoate, p-aminobenzenesulfonic acid, potassium p-aminobenzenesulfonate, N-methylaniline, N-propyl-N -phenylaniline, N-methyl-N-2-propenylaniline, N-benzilaniline, N- (2-ethylphenyl) aniline, 4-methylaniline, 4- (2-bromoethyl) aniline, 2- (2-nitroethyl) aniline, (4 -aminophenyl) acetaldehyde, (4-aminophenyl) acetic acid, 4- (2-propenyl) aniline acetate, 4- (3- P838 bromo-2-propenyl) aniline, 4-phenylalanine chloroacetate, 4- (3-chlorophenyl) aniline, 4-benzilaniline, 4- (4-iodobenzyl) aniline, 4- (3-ethylphenyl) aniline, 4- (2 -chloro-4-ethylphenyl) aniline. wherein Z and R7 are defined as the formula (IV) and Ra is hydrogen or alkenyl or substituted or unsubstituted alkyl of C1 to C4, wherein the substituents are selected from those defined as Z in the formula (IV). Specific examples of the compounds of the formula (V) are: phenol, p-chlorophenol, p-nitrophenol, p-hydroxybenzaldehyde, p-hydroxybenzoic acid, p-hydroxybenzenesulfonic acid, ethylphenyl ether, 2-chloroethylphenyl ether, 2-nitroethylphenyl ether, phenoxyacetaldehyde, phenoxyacetic acid, 3-phenoxy-1-propene, 3-phenoxy-2-nitro-1-propene, 3-phenoxy-2-bromo-1-propene, 4-propylphenol, 4- (3-bromopropyl) phenol, 2- (2-Nitroethyl) phenol, (4-hydroxyphenyl) acetaldehyde, acid (4- P838 hydroxyphenyl) acetic acid, 4- (2-pro? Enyl) phenol, 4-phenylphenol, 4-benzylphenol, 4- (3-fluoro-2-propenyl) phenol, 4- (4-chlorobenzyl) phenol, 4- (3 -ethylphenyl) phenol, 4- (2-chloro-3-ethylphenyl) phenol, 2,5-xylenol, 2,5-diaminopyridine, 2-hydroxy-5-aminopyridine, 2-amino-3-hydroxypyridine, tetraaminopyrimidine, 1, 2,4-trihydroxybenzene, 1,2,4-trihydroxy-5- (C? To C6 alkyl) benzene, 1,2,3-trihydroxybenzene, 4-aminoresorcinol, 1,2-dihydroxybenzene, 2-amino-1, 4 -dihydroxybenzene, 2-amino-4-methoxyphenol, 2,4-diaminophenol, 3-methoxy-l, 2-dihydroxybenzene, 1,4-dihydroxy-2- (N, N-diethylamino) benzene, 2,5-diamino- 4-methoxy-l-hydroxybenzene, 4,6-dimethoxy-3-amino-1-hydroxybenzene, 2,6-dimethyl-4- [N- (p-hydroxyphenyl) amino] -1-hydroxybenzene, 1,5-diamino -2-methyl-4- [N- (p-hydroxyphenyl) amino] benzene and salts thereof. Additional primary intermediates suitable for use herein include catechol species and in particular the "dopa" catechol species that include dopa itself as well as homologs, analogs and DOPA derivatives. Examples of suitable catechol species include cysteinyl dopa, alpha alkyl dopa having 1 to 4, preferably 1 to 2 carbon atoms in the alkyl group, epinephrine and dopa alkyl esters having from 1 to 6 carbon atoms and preferably from 1 to 2 carbon atoms in the alkyl group.

P838 The general suitable catechols are represented by the following formula (VI): wherein R1 # R2 and R3, which may be the same or different, are substituents acceptors or electron donors selected from H, lower alkyl (C1-C6), OH, OR, COOR, NHCOR, CN, COOH, Halogen, N02, CF3, S03H or NR4R5, provided that only one of R ?, R2 or R3 may be CN, COOH, halogen, N02, CF3 or S03H: R4 and R5, which may be the same or different are H, lower alkyl or substituted lower alkyl (Cj-C wherein the substituent may be OH, OR, NHC0R6, NHC0NH2, NHC02R6, NHCSNH2, CN, COOH, S03H, S02NR6, S02R6 or C02R6; R6 is lower alkyl (C1-C6), hydroxyalkyl (Cj - Lower phenyl linked to the nitrogen with an alkylene, phenyl or phenyl chain substituted with the substituent defined as R1 and R is C1-C6 alkyl or hydroxyalkyl Cj-C8 Also included here are oxidative hair dyeing agents of the general formula : P838 O or H where R? = substituted or unsubstituted benzene ring, tertiary butyl, etc .; R = substituted or unsubstituted benzene ring and the formula: wherein R = aminoalkyl, amidoalkyl, aminobenzene (substituted or unsubstituted), amidobenzene (substituted or unsubstituted), alkyl, substituted or unsubstituted benzene ring; R1 = substituted or unsubstituted benzene ring. The primary intermediates can be used here alone or in combination with other primary intermediates, and one or more can be used in combination with one or more couplers. The choice of primary and copulant intermediaries will be determined by the color, tone or P838 intensity of coloring, whatever is desired. There are nineteen preferred primary and preferred copulators that can be used here, in simple form or in combination, to provide dyes having a variety of shades ranging from ash blond to black, these are: pyrogallol, resorcinol, p-toluenediamine, p-phenylenediamine, o-phenylenediamine, m-phenylenediamine, or- aminophenol, p-aminophenol, 4-amino-2-nitrophenol, nitro-p-phenylenediamine, N-phenyl-p-phenylenediamine, m-aminophenol, 2-amino-3-hydroxypyridine, 1-naphthol, N, N bis (2 -hydroxyethyl) p-phenylenediamine, 4-amino-2-hydroxytoluene, 1,5-dihydroxynaphthalene, 2-methyl resorcinol and 2,4-diaminoanisole. These can be used in the molecular form or in the form of salts compatible with peroxide, as mentioned above. The primary intermediates and coupling compounds mentioned above may be combined to provide a wide variety of colors to the hair. Hair colors can vary in both color depth and color intensity. As described above, the compositions according to the present invention are valuable in order to provide high intensity colors. Color intensity, as defined herein, refers to the amount of color compound formed in the hair and retained by it. In general, P838 High intensity as defined here refers to dark or deep colors such as dark red, dark brown or black, etc. In accordance with the foregoing, it is possible to formulate hair colors of variable color intensity by adjusting the initial levels of each of the oxidative dye materials. For example, low intensity colors such as natural blond to light brown hair shades, generally comprise from about 0.001% to about 5%, preferably from about 0.1% to about 2%, more preferably about 0.2. % to about 1% by weight of the dyeing compositions of total oxidative dyeing agents and can be achieved by the combination of primary intermediates such as 1,4-diamino-benzene, 2,5-diamino toluene, 2,5-diamino-anisole , 4-aminophenol, 2,5-diamino-benzyl alcohol and 2- (2 ', 5'-diamino) phenylethanol with couplers such as resorcinol, 2-methyl resorcinol or 4-chloro resorcinol. Similar combinations of the above primary intermediates with couplers, for example, 5-amino-2-methylphenol and 1,3-diamino-benzene derivatives such as for example 2,4-diamino-anisole at levels of about 0.5% to about 1 % of total dyeing agents, can lead to red colors of medium intensity. The P838 high intensity colors such as blue to violet blue hair tones can be produced by the combination of the above primary intermediates with copulators such as 1,3-diaminobenzene or its derivatives such as 2,5-diamino-toluene at levels of about 1% to about 6% by weight of the composition of the total dyeing agents. The colors for black hair can be obtained by combining the aforementioned primary intermediates with couplers such as 1,3-diaminobenzene or its derivatives. However, considerations have to be made against the physiological compatibility of para-amino phenol which is commonly used to impart red color to hair. Similarly, the physiological compatibility of some of the favored agents for the production of the black color, for example paraphenylenediamine (PPD), has resurfaced. There is therefore a need for oxidative hair dye compositions having an improved safety profile and in particular oxidative dye compositions that provide dark colors, i.e. high color intensity dyes, which have an improved safety profile. As discussed above, the low pH compositions of the present invention provide excellent attributes of hair dye in combination with reduced levels of damage to the hair.

P838 hair and staining and / or skin irritation. As such, the compositions of the present invention are valuable in providing improved condition attributes to the hair in combination with good initial color development and consistency and improved color fastness to washing over time, in addition to having reduced levels of damage to the hair and of irritation and / or staining to the skin.

Non Oxidating and Other Dyes The hair coloring compositions of the present invention, in addition to the essential, oxidizing, hair coloring agents, may optionally include non-oxidizing and other dye materials. Optional non-oxidizing and other dyes suitable for use in hair coloring compositions and processes in accordance with the present invention include both semi-permanent, temporary and other dyes. Non-oxidizing dyes as defined herein include so-called "direct-acting dyes", metallic dyes, metal chelate dyes, fiber-reactive dyes and other synthetic and natural dyes. Several types of non-oxidizing dyes are detailed in: Chemical and Physical Behavior of Human Hair '3rd Ed.

P838 by Clarence Robbis (pp 250-259); 'The Chemistry and Manufacture of Cosmetics'. Volume IV. 2 - Ed. Maison G. De Navarre at chapter 45 by G.S. Kass (pp 841-920); 'Cosmetics: Science and Technology' 2nd ed., vol. II Balsam Sagarin, chapter 23 by F.E. Wall (pp 279-343): 'The Science of Hair Care' edited by C Zviak, chapter 7 (pp 235-261) and? Air Dyes'. J.C. Johnson. Noyes Data Corp., Park Ridge, U.S.A. (1973), (pp 3-91 and 139). Direct-acting dyes that do not require an oxidizing effect in order to develop color are also referred to as hair dyes and have been known for a long time in the art. * They are usually applied to the hair in a base matrix that includes surfactant material. Direct-acting dyes include nitro dyes such as the nitroamino-benzene or nitroaminophenol derivatives; dispersion dyes such as nitroarylamines, aminoanthraquinones or azo dyes, anthraquinone dyes, naphthoquinone dyes, basic dyes such as Acridine Orange C.l. 46005. Nitro dyes are added to the dyeing compositions to improve the color of the dye and to add aesthetic color, suitable to the dye mixture before application.

P838 Additional examples of direct-acting dyes include: the dyes of Arianor, basic coffee 17, C.l. (color index) - no. 12,251; basic red 76, C.l. - 12,245, basic coffee 16, C.l. - 12,250; basic yellow 57, C.l. - 12,719 and basic blue 99, C.l. - 56,059 and additional direct-acting dyes such as acid yellow 1, C.l. - 10,316 (D &C yellow No. 7); acid yellow 9, C.l. -13,015; basic violet C.l. -45-170; dispersed yellow 3, C.l. - 11,855, basic yellow 57, C.l. - 12,719; scattered yellow 1, C.l. - 10,345; violet basic 1, C.l. - 42,535 basic violet 3, C.l. 42,555; greenish blue, Cl. - 42090 (FD &C Blue No. 1); yellowish red, C.l. -14700 (FD &C red No. 4); yellow, C.l. 19140 (FD &C yellow No. 5), yellowish orange, C.l. 15985, (FD &C yellow No. 6); bluish green, C.l. 42053 (FD &C green No. 3); yellowish red, C.l. 16035 (FD &C red No. 40); bluish green, Cl. 61560 (D &C green No. 3); orange, C.l. 45370 (D &C orange No. 5); red, C.l. 15850 (D &C red No. 6); bluish red, C.l. 15850 (D &C red No. 7); light blue bluish C.l. 45380 (D &C red No. 22); bluish red, C.l. 45410 (D &C red No. 28); bluish red, C.l. 73360 (D &C red No. 30); reddish purple, Cl. 17200 (D &C red No. 33); impure blue-red, C.l. 15880 (D &C red No. 34); bright yellow red, C.l. 12085 P838 (D &C red No. 36); bright orange, C.l. 15510 (D &C orange No. 4); greenish yellow, C.l. 45005 (D &C yellow No. 10); bluish green, C.l. 59040 (D &C green No. 8); violet blue, C.l. 60730 (Ext D &C Violet No. 2); greenish yellow, C.l. 10316 (Ext. D &C yellow No. 7); Reactive dyes with fibers include Procion (RTM), Drimarene (RTM), Cibacron (RTM), Levafix (RTM) and Remazol (RTM) dyes available from ICI, Sandoz, Ciba-Geigy, Bayer and Hoechst, respectively. Natural dyes and vegetable dyes as defined herein include henna (La sonia alba), chamomile (Matricaria chamomila or anthemus nobilis), indigo, palo de campeche and nut shell extract. Temporary hair dyes, or hair coloring rinses, are generally comprised of dye molecules which are too large to diffuse into the hair shaft and which act on the outside of the hair. Usually, they are applied via a leave-in procedure in which the dye solution is allowed to dry on the hair surface. Since these dyes are typically less resistant to the effects of washing and cleaning the P838 hair with surfactants, and wash hair with relative ease. Any temporary dye for the hair can be suitably used in the compositions of the invention and examples for temporary, preferred hair dyes, as illustrated below.

Yellow blue Hair dyes, semi-permanent, are dyes that are generally smaller in size and perform temporary hair rinses, but are generally larger than permanent dyes (oxidants). Typically, semi-permanent dyes act in a manner similar to oxidant dyes and P838 that have the potential to diffuse into the hair shaft. However, semi-permanent dyes are generally smaller in size than the conjugated oxidizing dye molecules mentioned above and as such are predisposed to gradual diffusion out of the hair once again. The simple washing and cleansing action of the hair will encourage this process and in general the semi-permanent dyes are largely washed from the hair after approximately 5 to 8 weeks. Any semi-permanent dye system in the compositions of the present invention can suitably be used. Semi-permanent dyes suitable for use in the compositions of the present invention are Blue HC 2, Yellow HC 4, Red HC 3, Violet Dispersed 4, Black Dispersed 9, Blue HC 7, Yellow HC 2, Blue Dispersed 3, Violet Dispersed 1 and mixtures thereof. The examples of semi-permanent dyes are illustrated below: P838 Blue Blue Yellow Yellow Red Red Typical semi-permanent dye systems incorporate mixtures of both large and small color molecules. Since the size of the hair is not P838 uniform from the root tip, the small molecules will diffuse both at the root and at the tip, but will not be retained within the tip, while larger molecules will generally only be able to diffuse at the ends of the hair . This combination of dye molecule size is used to help give consistent color results from the root to the tip of the hair both during the initial dyeing process and during subsequent washing.

Shock-absorbing Agents The coloring compositions of the present invention have a pH in the range of from about 1 to about 6, preferably from 1.5 to about 5, more preferably from about 1.8 to about 4.7, more preferably from about 2 to about 4.6 , especially from about 2.5 to about 4.5 and more especially from about 2.7 to about 3.8. As described hereinbefore, the pH of the preferred coloring compositions of the present invention is kept within the range of P838 desired pH via the action of the inorganic peroxygen oxidizing agent. However, if desired, the compositions may contain one or more optional buffering agents and / or hair-swelling agents (HSAs). Various different pH modifiers can be used to adjust the pH of the final composition or any constituent part thereof. This pH adjustment can be effected by using well-known acidifying agents in the field of treatment of keratin fibers, and in particular human hair, such as inorganic and organic acids such as hydrochloric acid, tartaric acid, citric acid, acid succinic, phosphoric acid and carboxylic or sulphonic acids such as ascorbic acid, acetic acid, lactic acid, sulfuric acid, formic acid, ammonium sulfate and sodium dihydrogen phosphate / phosphoric acid, disodium hydrogen phosphate / phosphoric acid, potassium chloride / hydrochloric acid , potassium dihydrogen-phthalate / hydrochloric acid, dihydrogen-potassium citrate / hydrochloric acid, dihydrogen-potassium citrate / citric acid, sodium citrate / citric acid, sodium tartarate / tartaric acid, sodium lactate / lactic acid, acetate sodium / acetic acid, hydrogen phosphate P838 disodium / citric acid and sodium chloride / glycine-hydrochloric acid, succinic acid and mixtures thereof. Examples of alkaline buffering agents are ammonium hydroxide, ethylamine, dipropylamine, triethylamine and alkanediamines such as 1,3-diaminopropane, alkaline alkanolamines, anhydrouss such as mono- or di-ethanolamine, preferably those which are completely substituted in the amine group. such as dimethylaminoethanol, polyalkylene polyamines, such as diethylenetriamine or a heterocyclic amine such as morpholine as well as alkali metal hydroxides, such as sodium and potassium hydroxide, alkaline earth metal hydroxides, such as hydroxide and magnesium and calcium, basic amino acids such as L -arginine, lysine, alanine, leucine, iso-leucine, oxilisin and histidine and alkanolamines such as dimethylaminoethanol and aminoalkylpropanediol and mixtures thereof. Also suitable for use are the compounds that form HC03- by dissociation in water (hereinafter referred to as "ion-forming compounds"). Examples of suitable ion-forming compounds are Na 2 CO 3, NaHCO 3, K 2 CO 3, (NH 4) 2 CO 3, NH 4 HCO 3, CaCO 3 and Ca (HC 3) and mixtures thereof. Preferred for use herein as P838 buffering agents are organic and inorganic acids that have a first pKa below pH 6, and its conjugate bases. As defined herein, the first pKa means, the negative logarithm (to base 10) of the equilibrium constant K, where K 'is the maximum dissociation constant. Organic and inorganic acids suitable for use herein are: aspartic, maleic, tartaric, glutamic, glycolic, acetic, succinic, salicylic, formic, benzoic, malic, lactic, malonic, oxalic, citric, phosphoric and mixtures of the same. Particularly preferred are acetic acid, succinic, salicylic and phosphoric acid and mixtures thereof. The low pH dye compositions according to the present invention, when in the form of the intended use may, as described below, be comprised of a final solution containing both the oxidizing agent and a dye oxidative agent. for hair, which have been mixed before application to the hair, or a one-component system. In addition, optional materials may be present either in combination with the oxidizing agent / coloring agent mixture or as units in separate containers. In this way, the compositions according to the present invention P838 may comprise hair dye kits in several types of separate components. In oxidizing and coloring equipment comprising a portion of the inorganic peroxygen oxidizing agent, which may be present in either the solid or liquid form, a solution of buffering agent may be used to stabilize the hydrogen peroxide. Since hydrogen peroxide is stable in the pH range from 2 to 4, it is necessary to use a buffering agent having a pH within this range. Diluted acids are suitable buffering agents for hydrogen peroxide. In oxidizing and coloring equipment comprising an oxidizing agent (which may be in either solid or liquid form) in combination with one or more coloring agents, a buffering agent capable of maintaining a pH of solution in the range of about 1. to about 6, preferably from about 1.5 to about 5, more preferably from about 1.8 to about 4.7, more preferably from about 2 to about 4.6, more preferably from about 2.5 to about 4.5 and more especially from approximately 2.7 up P838 approximately 3.8. As such, it is necessary to use a buffering agent having a pH within this range.

Catalyst The colorant compositions herein may optionally contain a transition metal-containing catalyst for the peroxygen oxidizing agents and the peroxyacid oxidizing agent (s), preformed, optional. A suitable type of catalyst is a catalyst system comprising a heavy metal cation of the catalytic activity of a bleach, defined, such as copper, iron or manganese cations, an auxiliary metal cation having little or no catalytic activity of bleaching, such as zinc or aluminum cations, and a sequestrant having the stability constants defined for the catalytic and auxiliary metal cations, particularly ethylenediaminetetraacetic acid, ethylenediaminetetra (methylenephosphonic acid) and water soluble salts thereof. These catalysts are described in US-A-4, 430, 243. Other types of suitable catalysts include the manganese-based complexes described in US-A-5, 246, 621 and US-A-5, 244, 594. The examples Preferred P838s of these catalysts include Mn. (u-0) 3 (1, 4, 7-trimethyl-1,4,4-triazacyclononane) 2- (PF6) 2, Mn? p2 (u-0)? (u-OAc) 2 (1, 4, 7-trimethyl-1, 4,7-triazacyclononane) 2- (C10a) 2, MnIV4 (iu-0) 6 (1, 4,7-triazacyclononane) 4- (C104 ) 2, MnIXIMnI 4 (uO) 1 (u-OAc) 2- (1,4, 7-trimethyl-1,4,4,7-triazacyclononane) 2 (C104) 3, and mixtures thereof. Others are described in EP-A-0,6549,272. Other ligands suitable for use herein include 1, 5, 9-trimethyl-1, 5, 9-triazacyclododecane, 2-methyl-1, 4, 7-triazacyclononane, 2-methyl-1, 4,7-triazacyclononane, 1,2,4,7-tetramethyl-1,4-, 7-triazacyclononane, and mixtures thereof. For examples of suitable catalysts see US-A-4, 246, 612 and US-A-5, 227, 084. Also see US-A-5,194,416 teaching mononuclear manganese (IV) complexes such as Mn (1, 4, 7-trimethyl-1,4,4,7-triazacyclononane) (OCH 3) 3- (PF 6). Yet another suitable type of catalyst, as described in US-A-5,114,606, is a water-soluble complex of manganese (II), and / or (IV) with a ligand which is a polyhydroxy non-carboxylate compound having the minus three consecutive C-OH groups. Other examples include binuclear Mn formed in complex with tetra-N-dentate and ligands of bi-N-dentate including N4MnI3 :? (u-O) 2MnIVN4) + y [Bipy2MnXII (u-0) 2 Mn? vbipy2] - (C104) 3.

P838 Suitable additional catalysts are described, for example, in EP-A-0, 408, 131 (cobalt complex catalysts), EP-A-8, 384, 503, and EP-A-0, 306, 089 (metallo-porphyrin catalysts), US-A-4, 728, 455 (manganese catalysts / multidentate ligand), US-A-4, 711, 748 and EP-A-0, 224, 952, (manganese absorbed in aluminosilicate catalyst), US-4,601,845 (aluminosilicate support with manganese and zinc and magnesium salt), US-A-4, 626, 373 (manganese / ligand catalyst), US-1-4, 119 , 557 (ferric complex catalyst), DE-A-2, 054, 019 (cobalt chelator catalyst), CA-A-866,191 (transition metal containing salts), US-A-430,243 (chelators with cations of manganese and non-catalytic metal cations), and US-A-4, 728, 455 (manganese gluconate catalysts).

Heavy metal ion sequestrants The coloring compositions of the invention may contain as an additional component a heavy metal ion sequestrant. By "heavy metal ion sequestrant" is meant herein components that act to sequester (chelate or remove) metal ions P838 heavy. These components may also have calcium and magnesium chelating ability, but preferentially show selectivity for the binding of heavy metal ions such as iron, manganese and copper. These sequestering agents are valuable in the hair coloring compositions as described herein for the distribution of the controlled oxidizing action as well as for the provision of good storage stability of the hair coloring products. Heavy metal ion sequestrants are generally present at a level from about 0.005% to about 20%, preferably from about 0.01% to about 10%, more preferably from about 0.05% to about 2% by weight of The compositions. Various sequestering agents, including amino phosphonates, available as Dequest (RTM) from Monsanto, nitriloacetates, hydroxyethyl ethylene triamines and the like are known for this use. Suitable heavy metal ion sequestrants for use herein include organic phosphonates, such as amino-alkylene-poly (alkylene phosphonates), ethane-1-hydroxy-disphosphonates of metals P838 alkaline and no trilo-trimethylene phosphonates. Preferred among the above species are diethylene triamine penta (methylene phosphonate), ethylene diamine tri (methylene phosphonate), hexamethylene diamine tetra (methylene phosphonate) and hydroxy ethylene 1,1-disphosphonate. Preferred heavy-metal, non-phosphorus, non-phosphorus ion sequestrants suitable for use herein include nitrilotriacetic acid and polyaminocarboxylic acids such as ethylenediaminetetraacetic acid, ethylenetriamine pentaacetic acid, ethylenediamine disuccinic acid, ethylenediamine diglutaric acid, acid 2-hydroxypropylenediamine disuccinic, or any of the salts thereof. Especially preferred are ethylenediamine-N, N'-disuccinic acid (EDDS), see US-A-4,704,233, or the salts of alkali metals, alkaline earth metals, ammonium or substituted ammonium thereof, or mixtures thereof. Other suitable heavy metal ion sequestrants for use herein are iminodiacetic acid derivatives such as 2-hydroxyethyl diacetic acid or glyceryl imino diacetic acid, described in EP-A-317,542 and EP-A-399, 133. The iminodiacetic acid-N-2- acid sequestrants P838 hydroxypropyl sulfonic acid and aspartic acid-N-carboxymethyl l-N-2-hydroxypropyl 1-3-phonic acid acids described in EP-A-516,102 are also suitable herein. The β-alanine-N, N'-diacetic acid, aspartic acid-N, -diazetic, aspartic acid-N-monoacetic acid and iminodisuscinic acid sequestrants described in EP-A-509,382 are also suitable. EP-A-476,257 describes suitable amino-based sequestrants. EP-A-510,331 describes suitable sequestrants derived from collagen, keratin or casein. EP-A-528,859 describes a suitable alkyl-iminodiacetic acid sequestrant. Also suitable are dipicolinic acid and 2-phosphonabutane-1,2,4-tricarboxylic acid. Also suitable are glycinamide-N, N'-disuccinic acid (GADS), ethylenediamine-N-N '-diglutaric acid (EDDG) and 2-hydroxypropylenediamine-N-N'-disuccinic acid (HPDDS). The heavy metal ion sequestrants of the present invention can be used in their alkali metal or alkaline earth metal salts.

Thickeners The coloring compositions of the present invention may additionally include a thickener at a level from about 0.05% up to P838 about 20%, preferably from about 0.1% to about 10%, more preferably from about 0.5% to about 5% by weight. Thickening agents suitable for use in the compositions herein are selected from oleic acid, cetyl acid, oleyl alcohol, sodium chloride, cetearyl alcohol, stearyl alcohol, synthetic thickeners such as Carbopol, Aculyn and Acrosyl and mixtures of the same. Preferred thickeners for use herein are Aculyn 22 (RTM), steareth-20 methacrylate copolymer; Aculyn 44 (RTM), polyurethane resin and Acusol 830 (RTM), acrylate copolymer available from Rohm and Haas, Philadelphia, PA, USA. Additional thickeners suitable for use herein include sodium alginate or gum arabic, or cellulose derivatives, such as methylcellulose or the sodium salt of carboxymethylcellulose or acrylic polymers.

Diluent Water is the preferred diluent for the compositions according to the present invention. However, the compositions according to the present invention can include one or more solvents P838 as additional thinner materials. In general, solvents suitable for use in the colorant compositions of the present invention are selected to be water-miscible and skin-friendly. Solvents suitable for use as additional diluents herein include mono- or polyhydric alcohols of 1 to 20 carbon atoms and their esters, glycerin, with monohydric and dihydric alcohols and their esters which are more preferred. In these compounds, alcohol residues containing from 2 to 10 carbon atoms are preferred. Thus, a preferred group includes ethanol, isopropanol, n-propanol, butanol, propylene glycol, ethylene glycol monoethyl ether, and mixtures thereof. Water is the preferred main diluent in the compositions according to the present invention. The main diluent, as defined herein, means that the water level present is higher than the total level of any other diluent. The diluent is present at a level of preferably about 5% to about 99.98%, preferably from about 15% to about 99.5%, more preferably at least about 30% to P838 about 39%, and especially from about 50% to about 98% by weight of the compositions herein.

Enzyme An additional, extensive material useful in hair coloring compositions according to the present invention is one or more enzymes. Suitable enzyme materials include the commercially available lipases, cutinases, amylases, neutral and alkaline proteases, esterases, cellulases, peptinases, lactases and peroxidases commercially incorporated into the detergent compositions. Suitable enzymes are discussed in U.S. Patent No. 3,519,570 and 3,533,139. Peroxidases are specific hemoproteins for peroxide, but using a wide range of substrates as donors. Catalase that decomposes peroxide is included in the present in view of the fact that it is generally similar in structure and properties and is capable of certain oxidations by H202. The decomposition of H202 can be considered as the oxidation of one molecule by the other. It extends into aerobic cells and may have some more important function. The coenzyme, peroxidases are not P8J8 hemoproteins and at least one is falvoprotein. Other flavoproteins such as xanthine oxidase will also use H202 among other acceptors, and the coenzyme, peroxidases will resemble these in place of the classical peroxidases that are not specific for H202. Peroxidases suitable for the decomposition of the present invention include horseradish peroxidase, Japanese horseradish peroxidase, cow's milk peroxidase, rat liver peroxidase, linginase and haloperoxidase such as chlorine- and bromo-peroxidase. The enzymes are optionally incorporated at levels sufficient to provide up to about 50 mg by weight, more typically from about 0.01 g to about 10 mg of active enzyme per gram of the hair treatment composition of the invention. Expressed otherwise, the enzyme peroxidase may be incorporated in the compositions according to the invention at a level from about 0.0001% to about 5%, preferably from about 0.001% to about 1%, more preferably from about 0.01. % up to about 1% active enzyme per weight of the composition. Commercially available protease enzymes include those sold under the trademarksCommercial P838 Alcalase, Savinase, Primase, Durazym, and Esperase by Novo Industries A / S (Denmark), those sold by the trademark Maxatase, Maxacal and Maxapem by Gist-Brocades, those sold by Genecor International, and those sold under the name Opticlean and Optimase by Solvay Enzymes. The protease enzyme can be incorporated into the compositions according to the invention at a level from about 0.0001% to 4% active enzyme per weight of the composition. Amylases include, for example, α-amylases obtained from a special strain of B-licheniformis, described in more detail in GB-1,269,839 (Novo). Preferred commercially available amylases include, for example, those sold under the trademark Rapidase by Gist-Brocades, and those sold under the trademark Termamyl and BAN by Novo Industries A / S. The amylase enzyme can be incorporated in the composition according to the invention at a level from about 0.0001% to 2% active enzyme by weight of the composition. The lipolytic enzyme can be presented at levels of the active lipolytic enzyme from about 0.0001% to 2% by weight, preferably 0.001% to 1% by weight, more preferably from 0.001% to 0.5% by weight of the compositions . The lipase may be obtained from fungal or bacterial origin, for example, from a strain that produces Humicola lipase, sp. , Thermomyces, sp. Or Pseudomonas sp. Including Pseudomonas pseudoalealigenes or Pseudomas fluorescens. The lipase of chemically or genetically modified mutants of these strains are also useful, for example. A preferred lipase is derived from Pseudomonas pseudoalcaliqenes, which is described in the European Patent issued, EP-B-0218272. Another preferred lipase herein is obtained by cloning the gene from Humicola lanuginosay and expressing the gene in Asperqillus Oryza, as a host, as described in European Patent Application, EP-A-0258, 068, which is commercially available from Novo Industri A / S Bagsvaerd, Denmark, under the trade name Lipolase. This lipase is also described in U.S. Patent No. 4,810,414 to Huge-Jensen, et al., Issued March 7, 1989.

Surfactant Materials The compositions of the present invention may additionally contain an agent system P838 surfactant. Suitable surfactants for inclusion in the compositions of the invention generally have a lipophilic chain length of from about 8 to about 22 carbon atoms and can be selected from surfactants, anionic, cationic, amphoteric, zwitterionic, and mixtures thereof. (i) Anionic surfactants Suitable anionic surfactants for inclusion in the compositions of the invention include alkyl sulfates, alkyl ethoxylated sulfates, alkyl glyceryl ether sulphates, methyl acyl taurates, fatty acyl glycinates, N- acyl glutamates, acyl isethionates, alkyl sulfosuccinates, alkyl ethoxysulfosuccinates, alpha-sulfonated fatty acids, their salts and / or esters, alkyl ethoxy carboxylates, alkyl phosphate ethers, ethoxylated alkyl phosphate esters, sulfates of alkyl, acyl sarcosinates and fatty acid / protein condensates and mixtures thereof. The lengths of the alkyl and / or acyl chain for these surfactants are from 12 to 22 carbon atoms, more preferably from 12 to 18 carbon atoms, most preferably from 12 to 14.

P838 carbon atoms. (ii) Nonionic Surfactants The compositions of the invention may also comprise a water-soluble nonionic surfactant (s). Surfactants of this class include mono- and di-ethanolamines of fatty acid of 12 to 14 carbon atoms, sucrose-polyester surfactants and polyhydroxy fatty acid amide surfactants having the general formula below: O R "R.-C-N-Z, The fatty acid amide surfactants of N-alkyl, N-alkoxy or N-aryloxy, polyhydroxy, according to the above formula are those in which Rg is hydrocarbyl of 5 to 31 carbon atoms, preferably hydrocarbyl of 6 to 19 carbon atoms, including straight chain and branched chain alkyl and alkenyl, or mixtures thereof and R 9 is typically hydrogen, alkyl of 1 to 8 carbon atoms or hydroxyalkyl, preferably methyl, or a group of the formula -R ^ O-R2, where R1 is P838 hydrocarbyl of 2 to 8 carbon atoms including straight chain, branched chain and cyclic (including aryl), and is preferably alkylene-of 2 to 4 carbon atoms, R2 is straight chain hydrocarbyl, branched chain and cyclic chain of 1 to 8 carbon atoms, including aryl and oxyhydrocarbyl, and is preferably alkyl of 1 to 4 carbon atoms, especially methyl or phenyl. Z2 is a polyhydroxyhydrocarbyl portion having a linear hydrocarbyl chain with at least 2 (in the case of glyceraldehyde) or at least 3 hydroxyl (in the case of other reducing sugars) directly connected to the chain, or alkoxylated derivative (preferably ethoxylated) or propoxylated) thereof. Z2 will be preferably derived from a reducing sugar in a reductive amination reaction, more preferably Z2 is a glycityl portion. Suitable reducing sugars include glucose, fructose, maltose, lactose, galactose, mannose, and xylose, as well as glyceraldehyde. As raw materials, high dextrose corn syrup, high fructose corn syrup, high maltose corn syrup, as well as the individual sugars listed above can be used. These corn syrups can produce a mixture of P838 sugar components for Z2. It will be understood that it does not intend to exclude other raw materials. Z2 will preferably be selected from the group consisting of -CH2 (CHOH) n-CH2OH, -CH (CH2OH) - (CHOH) n-l-CH2H. CH2 (CHOH) 2 (CHOR ') CHOH) -CH2OH, wherein n is an integer from 1 to 5, inclusive, and R' is H or a cyclic mono- or polysaccharide, and alkoxylated derivatives thereof. As noted, more preferred are glycityls wherein n is 4, particularly -CH2- (CHOH) 4-CH2OH. The most preferred polyhydroxy fatty acid amide has the formula R8 (CO) N (CH,) CH2 (CHOH) 4CH2OH wherein R8 is a straight chain alkyl or alkylene group of 6 to 19 carbon atoms. In the compounds of the above formula, R8-C0-N < it can be, for example, cocoamide, stearamide, oleamide, lauramide, myristamide, capricamide, palmiamide, seboamide, etc. Nonionic surfactants, oil derivatives suitable for use herein include emollients derived from animals and plants, soluble in water, such as triglycerides with a polyethylene glycol chain inserted, mono and di-glycerides ethoxylated, polyethoxylated lanolines and derivatives of butter, ethoxylates. A preferred class of nonionic surfactants derived from oil P838 for use herein have the general formula below.

OR RCOCH2CH (OH) CH2 (OCH2CH2) pOH wherein n is from about 5 to about 200, preferably from about 20 to about 100, more preferably from about 30 to about 85, and wherein R comprises an aliphatic radical having an average of from about 5 to 20 atoms carbon, preferably from about 7 to about 18 carbon atoms. Suitable oils and ethoxylated acids of this class include polyethylene glycol glyceryl cocoate derivatives, glyceryl caproate, glyceryl caprylate, glyceryl seboate, glyceryl palmate, glyceryl stearate, glyceryl laurate, glyceryl oleate, glyceryl ricinoleate. , and glyceryl fatty esters derived from triglycerides, such as palm oil, almond oil, and corn oil, preferably glyceryl ceboate, and glyceryl cocoate.

P838 Preferred for use herein are polyethylene glycol-based, non-ionic, polyol fatty acid non-ionic surfactants of from 9 to 15 carbon atoms, containing on average from about 5 to about 50 ethyleneoxy portions per mole of surfactant. Fatty acids of 9 to 15 carbon atoms, polyethoxylated, based on polyethylene glycol, suitable for use herein include Pareth-3 of 9 to 11 carbon atoms, and Pareth-4 of 9 to 11 carbon atoms, Partht 5 of 9 to 11 carbon atoms, Pareth-6 of 9 to 11 carbon atoms, Pareth-7 of 9 to 11 carbon atoms, Pareth-8 of 11 to 15 carbon atoms, Pareth-3 of 11 to 15 atoms of carbon, Pareth-4 of 11 to 15 carbon atoms, Pareth-5 of 11 to 15 carbon atoms, Pareth-6 of 11 to 15 carbon atoms, Pareth-7 of 11 to 15 carbon atoms, Pareth-8 from 11 to 15 carbon atoms, Pareth-9 from 11 to 15 carbon atoms and Pareth-10 from 11 to 15 carbon atoms, Pareth-11 from 11 to 15 carbon atoms, Pareth-12 from 11 to 15 carbon atoms. carbon, Pareth-13 of 11 to 15 carbon atoms and Pareth-14 of 11 to 15 carbon atoms. Hydrogenated castor oil, PEG 40 is commercially available under the trademark Cremaphor (RTM) from BASF. The cocoate of P838 PEG 7 glyceryl and PEG 20 glyceryl laurate are commercially available from Henkel under the trade names of Cetiol (RTM) HE and Lamacit (RTM) GML 20, respectively. Pareth-8 DE 9 to 11 carbon atoms is commercially available from Shell Ltd under the trade name Dobanol (RTM) 91-8. Particularly preferred for use herein are the polyethylene glycol ethers of cetearyl alcohol such as Ceteareth 25 which is available from BASF under the tradename Cremaphor A25. Also suitable for use herein are the nonionic surfactants derived from vegetable fat obtained from the fruit of the Shea tree (Butyrospermum Karkii Kotschy) and derivatives thereof. Similarly, the ethoxylated derivatives of Mango, Cacao and Hipe butter can be used in compositions according to the invention. Although these are classified as non-ionic, ethoxylated surfactants, it is understood that a certain proportion can remain as vegetable oil, or non-ethoxylated fat. Other suitable nonionic surfactants, oil derivatives, include ethoxylated derivatives of almond oil, peanut oil, rice bran oil, wheat germ oil, P838 linseed oil, jojoba oil, apricot kernel oil, walnuts, palm kernel, pistachio, sesame seeds, nava, juniper oil, corn oil, peach kernel oil, poppy seed oil, oil of pine, castor oil, soybean oil, avocado oil, safflower oil, coconut oil, hazelnut oil, olive oil, grape seed oil, and sunflower seed oil. (iii) Amphoteric surfactants Amphoteric surfactants, for use in the compositions of the invention include: (a) imidazolinium surfactant of the formula (VIII) C2H4OR2 fí¬ wherein Rx is alkyl of 7 to 22 carbon atoms or alkenyl, R2 is hydrogen or CH2Z, each Z is independently C02M or CH2C02M, and M is H, alkali metal, alkaline earth metal, ammonium or alkanolammonium and / or ammonium derivatives of the formula (VIII).

P838 C2H4OH RiCONHí H ^ UN-CH ^ Z R2 wherein R1 # R2 and Z are as defined above; (b) aminoalkanoates of the formula (IX) Iminodialkanoates of the formula (X) RiNHCHaJCOa And iminopolyalkanoates of the formula (XI) Rl.fN (CH:) p] qN [CH2C? 2M] 2 - I I CH2C02M wherein n, m, p, and q are numbers from 1 to 4, and R1 and M are independently selected from the groups specified above; Y (c) Mixtures thereof Suitable amphoteric surfactants of type (a) are sold under the trademark Miranol and Empigen and it is understood that P838 comprise a complex mixture of species. Traditionally, miranoles have been described as having the general formula (VII), although the CTFA cosmetic ingredients dictionary, 3rd Edition indicates the non-cyclic structure (VIII), while the 4-Edition indicates yet another structural isomer in the which R2 is O-linked instead of N-linked. In practice, a complex mixture of cyclical and non-cyclic species probably exists and both definitions are given in the present for the sake of fullness. Preferred for use herein, however, are non-ionic species. Examples of suitable amphoteric surfactants of type (a) include compounds of formula XII and / or XIII in which R? is C8H17 (especially iso-capryl), C9H19 and C11H23-alkyl. Especially preferred are the compounds in which R i is C 9 H 19, Z is CO, M and R, is H; the compounds in which R1 is C ^ H ^, Z is C02M and R2 is CH2C02M; and the compounds in which R1 is C11H23, Z is C02M and R2 is H. In the CTFA nomenclature, materials suitable for use in the present invention include cocoanfocarboxypropionate, cocoanfocarboxypropionic acid, and especially cocoamphoacetate and P838 cocoamphodiacetate (otherwise referred to as cocoanfocarboxiglycinates). Specific commercial products include those sold under the trade names of Ampholak 7TX (carboxymethyl-tallow polypropyl-aminosodium), Empigen CDL60 and CDR 60 (Albright &Wilson), Miranol H2M Conc. Miranol C2M Conc. N.P., Miranol C2M Conc. OP., Miranol C2M SF, Miranol CM Special (Rhóne-Poulenc); Alcateric 2CIB (Alcaril Chemicals); Amphoterge W-2 (Lonza, Inc.); Monateric CDX-38, Monateric CSH-32 (Mona Industries); Rewoteric AM-2C (Rewo Chemical Group); and Schercotic MS-2 (Scher Chemicals). Additional examples of amphoteric surfactants suitable for use herein include octoxynol-1 (RTM), polyoxyethylene octylphenyl ether (1); nonoxonil-4 (RTM), polyoxyethylene nonylphenyl ether (4) and Nonoxynol-9, polyoxyethylene nonylphenyl ether (9). It will be understood that a number of commercially available amphoteric surfactants of this type are manufactured and sold in the form of electroneutral complexes with, for example, hydroxid counterions or with anionic sulfate or sulfonate surfactants, especially those of sulfated alcohol of 8 a 18 carbon atoms, ethoxylated alcohol of 8 to 18 carbon atoms, or acyl types P838 glycerides of 8 to 18 carbon atoms. It is noted that the concentrations and weight ratios of amphoteric surfactants are based herein on the complex non-turn forms of the surfactants, any counterion of anionic surfactant that is considered as part of the complete content of the agent component. anionic surfactant. Examples of preferred amphoteric surfactants of type (b) include N-alkyl-poly trimethylene poly, carboxymethylamines, sold under the trade names Ampholak X07 and Ampholak 7CX by Berol Nobel and their salts, especially the triethanolammonium salts and the salts of N-lauryl-beta-amine propionic acid and N-lauryl-imino-dipropionic acid. These materials are sold under the trade name Deriphat by Henkel and Mirataine by Rhdne-Poulenc. (iv) Zwitterionic surfactants The zwitterionic, auxiliary, water-soluble surfactants suitable for inclusion in the composition of the present invention include alkyl betaines of the formula R5R6R7N + (CH2) nC02M and amidobetaines of the formula (XII) a continuation: P838 R- O (ZK2 'rr.NÍCH- nC02M wherein R5 is alkyl or alkenyl of 11 to 22 carbon atoms, Ro and R7 are independently alkyl of 1 to 3 carbon atoms, M is H, alkali metal, alkaline earth metal, ammonium or alkanolammonium, and n, m are each numbers from 1 to 4. Preferred betaines include cocoamidopropyl dimethylcarboxymethyl betaine, laurylamidopropyl dimethylcarboxymethyl betaine and Tego betaine (RTM). The water-soluble auxiliary sultaine surfactants suitable for inclusion in the compositions of the present invention include alkyl sultaines of the formula (XIII) below: R1CON (CH2) mN + (CH2) nCH (OH) CH2S? 3- " R. wherein R1 is alkyl or alkenyl of 7 to 22 carbon atoms, R2 and R3 are independently alkyl of 1 to 3 P838 carbon atoms, M is H, alkali metal, alkaline earth metal, ammonium or alkanolammonium and m and n are numbers from 1 to 4. Preferred for use herein is coco-amido-propylhydroxy-sultaine. The water-soluble auxiliary amine oxide surfactants suitable for inclusion in the compositions of the present invention include alkyl amine oxide R5R6R7NO and amido-amine oxides of the formula (XIV) below: R5CON (CH2) mN or I wherein R5 is alkyl or alkenyl of 11 to 22 carbon atoms, R6 and R7 are independently alkyl of 1 to 3 carbon atoms, M is H, alkali metal, alkaline earth metal, ammonium or alkanolammonium, and m is a number of 1 to 4. Preferred amine oxides include cocoamidopropylamine oxide, lauryl dimethyl amine oxide and myristyl dimethyl amine oxide.

Optional Materials A number of materials can be added P838 optional, in addition to the coloration compositions herein described, each at a level from about 0.001% to about 5%, preferably from about 0.01% to about 3%, more preferably from about 0.05% to about 2% of the composition. These materials include proteins and polypeptides and derivatives thereof. Water soluble or solubilizable preservatives such as DMDM Hydantoin, Germall 115, methyl, ethyl, propyl, and butyl esters of hydroxybenzoic acid, EDTA, Euxyl (RTM) K400, natural preservatives such as benzyl alcohol, potassium sorbate and bisabalol, benzoic acid , sodium benzoate and 2-phenoxyethanol; antioxidants such as sodium sulfite, hydroquinone sodium bisulfite, sodium metabisulfite and thioglycolic acid, sodium dithionite, erythrobic acid and other mercaptans; dye removers such as oxalic acid, sulphated castor oil, salicylic acid and sodium thiosulfate; H202 stabilizers such as tin compound such as sodium stannate, stannic hydroxide, and stannous octoate, acetanilide, colloidal silica with phenacetin such as magnesium silicate, oxyquinoline sulfate, sodium sulfate, and tetrasodium pyrophosphate; And p- P838 hydroxybenzoates, wetting agents such as hyaluronic acid, chitin, and sodium polyacrylates grafted with starch such as Sanwet (RTM) MI-1000, MI-1500 and MI-2500 available from Cleanese Superabsorbent Materials, Portsmith, VA, USA and described in US-A-4,076,663, as well as methyl cellulose, starch, higher fatty alcohols, paraffin oils, fatty acids and the like; solvents; antibacterial agents such as Oxeco (phenoxy-isopropanol); low temperature phase modifiers such as ammonium ion sources (for example, NH4C1); viscosity control agents such as magnesium sulfate and other electrolytes; quaternary amine compounds such as distearyl-dialuryl, di-hydrogenated beef bait, dimethyl-ammonium chloride, diacetyl ammonium sulfate, dimethyl ammonium-methoxyl sulfate, disoya-dimethyl-ammonium chloride, and dicoco-dimethyl-ammonium chloride; hair conditioning agents such as silicones, higher alcohols, cationic polymers and the like; are enzyme abilizers such as water soluble sources of calcium or borate species; coloring agents; Ti02 and mica coated with Ti02; perfumes and solubilisables of perfume; and zeolites such as Valfour BV400 and derivatives thereof and Ca2 + / Mg2 + sequestrants such as polycarboxylates, amino- P838 polycarboxylates, polyphosphonates, amino polyphosphonates, etc., and aqueous softening agents such as sodium citrate. The present invention is represented by the following non-limiting examples. In the examples, all concentrations are on an active basis of 100% and all percentages by weight unless otherwise indicated and abbreviations have the following designations: Oxidizing agent 1 Hydrogen peroxide Oxidizing agent 2 Peracetic acid Oxidizing stain 1 Para-phenylenediamine Oxidant stain 2 Para-aminophenol Oxidant stain 3 Meta-aminophenol Oxidant stain 4 2 -amino-3-hydroxy-pyridine Oxidant stain 5 4-amino-2 - hydroxytoluene Non-oxidizing dye Basic red 76 Chelating agent Ethylene diamine tetraacetic acid Surfactant 1 Ceteareth-25 Surfactant 2 Cocoamidopropyl betaine Thickener 1 Cetyl alcohol Thickener 2 Stearyl alcohol Antioxidant Sodium sulfite Buffering agent Acetic acid P838 Examples I-VII The following are hair treatment compositions in the form of hair coloring compositions that are representative of the present invention.

Ingredient I II III IV V VI VII Oxidizing agent 0.7 0.7 0.7 0.7 0.7 - 0.2 1 Oxidizing agent - - - - - 2.0 0.5 2 Oxidizing dye 0.24 0.14 0.24 0.15 0.24 0.475 0.24 1 Oxidizing dye 0.09 0.05 0.009 0.5 0.09 0.18 2 Oxidizing dye 0.006 0.004 0.006 - 0.006 0.012 0.006 3 Oxidizing dye 0.06 0.03 0.06 0.1 0.06 0.11 0.06 4 Oxidizing dye - - - 0.5 5 Dye not - - - - - - 0.1 Oxidant Agent 1.5 1.7 1.5 1.5 1.5 3.0 surfactant 1 Agent - - - - - - 1.5 surfactant 2 Agent 0.1 0.06 0.09 0.2 0.1 0.2 0.1 chelating Thickener 1 2.3 2.6 2.3 2.3 2.3 4.5 2.3 P838 Thickener 2 2.3 2.6 2.3 2.3 2.3 4.5 2.3 Antioxidant 0.1 0.06 0.1 0.2 0.1 0.2 0.1 Shock absorber - - 0.5 0.5 - - Water Pa -rt. a Tl e PH 4.0 3.8 3.9 4.6 2.7 2.4 In the examples, water is used as the diluent. However, in variations of the present water may be replaced, in part, by from about 0.5% to about 50% by weight of the total water content of the examples or diluents such as lower alcohols, eg, ethylene glycol, ether ethylene glycol monoethyl ether, diethylene glycol, diethylene glycol monoethyl ether, propylene glycol, 1,3-propanediol, ethanol, isopropyl alcohol, glycerin, butoxy ethane. , ethoxydiglycol, hexylene glycol, polyglyceryl-2-oleyl ether and mixtures thereof.

EXPERIMENTAL METHODS Assessment I.- Initial Color Assessment and Color Change The equipment used to measure both the initial color and the color change in the substrates (hair / skin) dyed with the compositions of P838 low pH coloration of the present invention is a Hunter Colorquest spectrophotometer. The value used to express the degree of color change in any particular substrate is Delta E (? E). Delta E, as defined herein, is represented by an accurate sum of the values L, a and b such as: ? E = (? L2 +? A2 +? B2) l / 2 and L is a measure of clarity and darkness (color intensity), where L = 100 is equivalent to white and L = 0 is equivalent to black. In addition, "a" is a measure of the green and red ratios (color tone) such that positive is equal to red and negative is equal to green, and "b" is a measure of the yellow and blue ratio (color tone ) such that positive is equal to yellow and negative is equal to blue. Measurements with Hunter Coloquest can be carried out on the Hunter Labscan Colorimeter which is a full-spectrum spectrocolorimeter with a wavelength of 400-7700 nanometers that records the color of the test hair braids (tresses) in terms of the values "L", "a" and "b". The machine adjusts to mode- 0/45, hole size- 1 inch, division size - 1 inch; P838 light - D65; division field -10a; UV lamp / filter -none. The hair is placed in a sample holder designed to hold the hair in a uniform orientation during measurement. Equivalent colorimeters can be used, but it must be ensured that the hair does not move during the measurement. The hair should be extended to cover the 1-inch hole during the color measurement. Points are placed on the braid support to guide the placement of the support in the hole. The points are aligned with a mark in the hole and the readings are taken at each site. Eight measurements are taken per braid, 4 on each side, and three braids are run per treatment.

II. Assessment of the Color Retention Potential The equipment used to measure both the initial color potential (Delta E White) and the potential for color development after a period of storage (Delta E stored) for any specific hair dye composition is detailed below as the Hunter Colorquest spectrophotometer. The Delta E White? ET, represents the color developed by the composition in the mixture. Delta E Stored,? ES, represents the color developed by the composition after a storage period (a P838 approximately room temperature, 25 ° C). The start of the storage period, X, is defined here as zero time, that is, from the initial mixing point of (a) and (b) at a low pH. The storage period can be from a few days to several months. The retention potential of the color? EP, can be expressed as the difference between the initial development of the color? ET and the color development after storage? E as illustrated in the following formula: ? EP =? ET -? E £ The smaller the difference between? ET and? The greater the potential for color development? Ep. In the preferred compositions according to the invention, EP after at least about 1 hour (60 minutes) of storage is less than about 2, preferably less than about 1, more preferably less than about 0.2. After at least about 1 day (24 hours) EP is less than about 2, preferably less than about 1, more preferably less than about 0.3. After at least about 1 month? Ep is less than about 3, preferably less than about 1.5, more preferably less than P838 approximately 0.3. The relative change in the color development potential after a storage period (X),%? Ep, can also be expressed in terms of the initial white color percentage? ET, which is administered to the hair after storage. In this way, the percentage of color development potential for any specific composition can be expressed with the following formula: %? EP =? ET -? ES /? ET X 100 In the preferred compositions according to the present invention, the color administered to the hair at least 1 hour (60 minutes) of storage (Delta E stored) at room temperature (25 ° C) is greater than about 75%, preferably greater than about 80%, more preferably greater than about 85%, still more preferably greater than about 90% and especially greater than about 95% of the color administered to the hair during the first mix (initial Delta E). Preferred compositions according to the present invention, the color administered to the hair after at least 1 day (24 hours) of storage (Delta E stored) at room temperature (25 ° C) is greater P838 of about 75%, preferably greater than about 80%, more preferably greater than about 85%, still more preferably greater than about 90% and especially greater than about 95% of the color administered to the hair to the first blend ( Initial Delta E). In the preferred compositions according to the present invention the color administered to the hair after at least one month of storage (Delta E stored) at room temperature (25 ° C) is greater than about 75%, preferably greater than about 80 %, more preferably "greater than about 85%, still more preferably greater than about 90% and especially preferably greater than about 95% of the color administered to the hair in the first mixture (initial Delta E).

III. Normal Hair Braid The compositions according to the present invention can be used to color hair of all colors, types and condition. For the purposes of illustration, two types of test hair braids have been tested herein; light coffee and light coffee with 40% gray coverage. These braids of normal hair can be measured in P838 terms of their values L, a, and b.

L A b Light coffee 60 9 32 Light coffee with 40% gray 35-37 4.5 - 5.5 11.5 - 12.7 IV. Method to Dye a Hair Braid To dye the hair, a braid of 4 grams and approximately 8 inches long, hangs in a suitable container. The test dye product is prepared at this time (ie, when applied, the components that come in separate bottles are mixed) and approximately 8 grams of product are applied directly to the test hair insert. The dye is massaged through the hairpiece for about 1 minute and then left on the hairpiece for approximately 30 minutes. After rinsing with tap water for about 1 to 2 minutes, the colored hairpiece is cleaned (according to a shampooing protocol) and dried. Drying can be done either naturally (without heat) or using a dryer. The color development (initial color) of the hair test hair, dry, clean, and dyed, can then be assessed using a Hunter Colorquest Spectrophotometer.

P838 For the administration of a red shade (hue) to light brown hair, previously discolored, and permanently (which has values L, a, b of approximately 60, 9 and 32) the preferred initial shade of the dyed hair will have a value of hue (tangent arc of (b / a)) in the range of from about 25 to about 70, more preferably from about 30 to about 65, still more preferably from about 35 to about 60 and wherein the initial color intensity (L) is greater than about 10 and less than about 70, preferably greater than about and less than about 65, more preferably greater than about 20 and less than about 60. For the administration of a brown or black shade (hue), to a light brown hair, previously discolored, previously with permanent (having L values). , a, b of approximately 60, 9 and 32) the preferred initial shade of the dyed hair will be a hue value (tangent arc of (b / a)) of less than about 25, preferably less than about 20 and the initial color intensity (L) will be greater than about 1 and less than about 50, preferably greater than about 5 and less than about 45. Administer a light brown tone (nuance) to a light brown hair previously discolored, previously with P838 permanent (having values L, a, b of approximately 60, 9 and 32) the preferred initial hue of the dyed hair will have a hue or hue value (tangent arc of (b / a)) in the range of about 70 a about 110 and wherein the initial color intensity (L) will be greater than about 20 and less than about 95, preferably greater than about 25 and less than about 90.

V. Braid Hair Cleaning Method Colored hair braids were subjected to a repeated cleaning cycle where the following process is repeated up to 10 times. An 8-inch test braid, 4 grams. Colored hair was held in a suitable container and thoroughly rinsed for approximately 10 seconds using hot water (at approximately 100 aF at approximately 1.5 gallons / minute pressure). Then shampoo (approximately 0.4 ml of nonconditioning shampoo) was directly applied to the wet test lock using a syringe. After foaming of the hair for about 30 seconds, the hair was rinsed in warm, running water for about 30 seconds. The washing process with P838 shampoo and foaming was then repeated with a final rinse of 60 seconds. Then the excess water (squeezed) of the test braid is removed using the fingers. The test lock is then dried either manually, using a preheated dryer box at approximately 1402F (for about 30 minutes). The test hair braid, dry, clean, colored, then it can be evaluated in its color (Fading delta E). During any individual test cycle, each different braid to be evaluated must be tested in water temperature, pressure level and hardness level, equivalents. The results of delta E fading for light brown hair pre-whitened, pre-treated for permanent hair (having L, a, b values of approximately 60.9 and 32) to be colored to red hue (of tone value in the range from about 25 to about 70) are generally less than about 5.0, preferably less than about 4.5, more preferably less than 4.0, and where the change in hair color,% delta E, after 20 washes , and less than about 20%, and preferably less than about 15%, more preferably P838 less than about 10%. The results of delta E fading for light brown hair, pre-whitened, pre-treated for permanent (having L, a, b values of approximately 60.9 and 32) that has been colored to a brown or black hue (of tone value) in the range from about 25) are generally less than about 2.3, preferably less than about 2.0, more preferably less than about 1.7, and wherein the change in hair color,% delta E, after 20 washed, and less than about 5%, and preferably less than about 4.5%, more preferably less than about 4% more preferably less than about 3.5%. The results of delta E fading for light brown hair, pre-whitened, pre-treated for permanent (having L, a, b values of approximately 60.9 and 32) that have been colored to a brown or black hue (of tone value in the range from about 70 to about 110) are generally less than about 2.6, preferably less than about 2.3, and wherein the change in hair color,% delta E, after 20 washes, and less than about 15%, and in P838 preferably less than about 12%, more preferably less than about 10% more preferably less than about 8%.

SAW. Skin Staining Test Method For the purposes of the present invention, skin staining results are based on pig staining data. Skin staining measurements can be made on pig ears, preferably freshly slaughtered pig ears. The ears should not have been subjected to undue heating (burn). The hair is shaved from the flatter section of the ear that is going to be dyed. Pre-mark an area of at least 1 centimeter by 5 centimeters in the ear (using permanent marker) and the ear is then cleaned with non-conditioning shampoo (0.1 g / cm2 at 10% dilution). After massaging the shampoo for about 1 minute, the ear is rinsed for approximately 30 seconds then gently patted by hand with a paper towel. The readings of the color evaluation of the baseline (L, a, b) for the pre-marked area. The test temp then is applied to the pre-marked test area (approximately 0.25 g / cm2) and massaged for approximately 1 minute and left P838 remain in the ear for approximately 30 minutes. The accumulated ear is then rinsed with approximately 2 liters of tap water at approximately 372C and then dried by hand as before. Then the reading of color information (L, a, b) is taken for the pre-marked area of the dry ear. The total color change (Delta E) can then be calculated from the values L, a, b and are expressed as relative levels of skin staining (against baseline color) VII. PH Measurement For the purposes of the present invention, as described herein, all pH measurements are carried out on a Mettier Toledo 320 pH meter. All pH measurements of the dyes, oxidizing agents and mixtures of the same, either individually or in combination with a suitable distributor medium, such as water and surfactant and / or dispersants, are carried out at room temperature (approximately 252C). The pH of the dye mixtures was measured in the proposed light shape and before the application. A preferred teaching medium for use herein comprises an emulsion of ceteareth-25 at a level from P838 about 1% to about 3% by weight; cetyl alcohol at a level from about 2% to about 5% by weight and stearyl alcohol at a level from about 2% to about 5% of the composition solution.

EXPERIMENTAL DATA I. Color Retention Potential (color administered after storage) The formulas of Examples I-VII provide improved color retention potential over time relative to similar compositions having a pH outside the scope of the present invention. .

II. Initial Color and Washing Firmness Example Formula I provides improved initial color and fading resistance against a similar composition having pH outside the scope of the present invention. Exemplary Formula II provides improved initial color development and wash fastness against a similar high pH Formula that contains the same level of oxidant and up to 60% more dye. The example Formula III provides P838 Improved initial color development against a high pH formula containing the same level of tempt but more inorganic peroxygen oxidizing agent.

III. Skin Relative Staining Exemplary Formula IV provides reduced levels of skin staining in a pig's ear against a composition equivalent to high pH.

Manufacturing Method It is important that the dyeing compositions be in a form that is easy and combined to be prepared and used by the consumer, since the oxidizing agent must remain in contact with the hair for a certain period of time and not run or dripping of the hair, possibly causing irritation of the skin or eye. To solve the above problem, the dye compositions of the present invention can be provided both in a single package and in the form of a kit as components in separate packages, to preserve stability and, if desired, be mixed by the user immediately. before application to the hair, or mixed and stored for future use, or mixed and partially used keeping the P838 rest for future use. As described hereinabove, the compositions according to the present invention can be used by the consumer as a single component package. This individual package will comprise an individual solution at pH 1 to 5 containing both the oxidizing agent and oxidative dye precursors and additional optional agents, such as for example surfactants, antioxidants, thickeners, etc. The oxidation will be applied directly to the hair by the consumer without the need for any pretreatment or mixing, thus providing a simple, fast, easy to use, non-tangling hair coloring system. The additional advantage of this individual component system is that it can be stored and reused, that is, a small individual could contain sufficient coloration composition for several applications over time. Thus, in accordance with a further aspect of the present invention, there is provided: A method for coloring the hair wherein a hair coloring mixture is presented in an individual package and applied directly to the hair and wherein the mixture of hair Hair coloring comprises: P838 (a) from about 0.01% to about 6% by weight of an oxidizing agent; and (b) from about 0.001% to about 5% by weight of a hair dye oxidative agent, wherein the pH of each of (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 6 and wherein the resulting color administered to the hair (Delta E), after at least 1 month of storage at room temperature environment, is greater than about 75%, preferably greater than about 85%, more preferably greater than about 90% and still more preferably greater than about 95% of the total color administered to the hair (Delta E) from a mixture of (a) and (b) in the mixing. A method for dyeing hair wherein the dyeing composition for hair is present in the form of components (a) and (b) in separate containers, wherein the hair dye composition comprises: (a) of about 0.0003 moles (per lOOg of composition) to less than about 0.2 moles (per lOOg of composition) of an oxidizing agent, wherein the pH of (a) is in the range of about 1 about 6; Y P838 (b) an oxidative hair dyeing agent wherein the pH of (b) is in the range of about 1 to about 6; wherein each of (a) and (b) are stable at pHs in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) is stable over time and has a pH in the range from about 1 to about 5, and wherein both (a) and (b) are capable of being stored at low pH either separately or once mixed and wherein the resulting color delivered to the hair (Delta E) after up to 1 month of storage is up to 75%, preferably up to 85%, more preferably up to 90% and still more preferably up to 95% of the total color administered to the hair (Delta E) from a mixture of ( a) and (b) after one hour of storage. Alternatively, the compositions according to the invention may be packaged in the following manner: a component of the kit comprises an individually packaged oxidizing component while other components of the kit may comprise a mixture of dyeing agents and, optionally, an individually packaged oxidizing agent, or two individual packages of oxidizing agent and dyeing agents. In one embodiment of the present invention, the oxidizing component comprises an aqueous solution P838 stabilized from an oxidizing agent, more generally hydrogen peroxide in an amount such that the final concentration of the compound that is used on the hair is from about 0.05% to about 6% by weight and the additional agents are as described above. The compositions can either be mixed by the user immediately before application to the hair or can be stored for future application. Examples of these kits are the following: I. A hair dye kit is assembled to comprise a single package that includes therein: (1) a 50 ml bottle of hydrogen peroxide (6% by weight of H202); and (2) a 50 ml bottle containing one or more oxidative hair dyeing agents and additional agents such as surfactants, antioxidants, thickeners, etc. The hair dye oxidative agents are mixed with the hydrogen peroxide to form the low pH dye system of the present invention. The resulting solution can be applied either to the hair directly to dye it or stored for a period of time and applied at a later time. Also, after the use of a composition according to the present invention for dyeing the hair, any remaining dye composition that may be stored above for future use.

P838 Method of Use The compositions described herein are used to color the hair. The coloring compositions are applied to the hair in the present for periods of from 1 to 60 minutes depending on the degree of coloring required. A preferred time is between 5 minutes and 30 minutes. The coloring compositions according to the present invention can be applied to both wet and dry hair. As described hereinabove, the coloring composition may be present as a single pack, containing both an oxidizing agent and an oxidative hair dye agent in a storage stable mixture, at low pH, suitable for direct application to the hair Alternatively, the dyeing compositions may be present in the form of a kit, wherein one component comprises an oxidizing agent and an additional component comprises oxidative hair dyeing agents. Hair dye kits according to the present invention can be used to color the hair in several ways which include: (i) the single component of the low pH, pre-mixed kit is applied directly to the hair.

P838 (ii) the single component of the kit, at low pH, pre-mixed is applied directly to the hair after a period of storage at room temperature. (iii) the components of the low pH kit, separated, are mixed to form a low pH dye composition before direct application to the hair. (iv) the components of the low pH kit are stored separately and then mixed to form a low pH dye composition before direct application to the hair. The products according to the present invention are storage stable and are reusable and provide excellent initial hair coloring and good efficacy benefits during use.

P838

Claims (19)

1. CLAIMS: 1. A hair dye composition, reusable, stable to storage, comprising: (a) an oxidizing agent; and (b) a hair dye oxidative agent; wherein the pH of each of (a) and (b) is in the range of about 1 to about 6 and wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 5, and wherein both (a) and (b) are capable of being stored at low pH, either separately or once mixed, for at least 1 month at room temperature and where the resulting color is delivered to the hair ( Delta E) is up to about 75%, preferably up to about 85%, more preferably up to about 90% and still more preferably up to about 95% of the total color delivered to the hair (Delta E) from a mixture from (a) and (b) during mixing. A composition according to claim 1, wherein the pH of the composition is in the range of from about 1.5 to about 5, more preferably from about 1.8 to about 4.7, still more preferably from about 2.5 to
2. P838 about 4.5 and especially about 2.7 to about 3.8.
3. 3. A composition according to claim 1 or

   2, wherein the oxidizing agent is selected from inorganic peroxygen oxidizing agents, preformed organic peroxyacid oxidizing agents, organic peroxide oxidizing agents and mixtures thereof.
4. 4. A composition according to claim 1 or

   3, wherein the oxidizing agent is a preceding inorganic peroxygen oxidizing agent at a level of from about 0.01% to about 3%, preferably from about 0.01% to about 2%, more preferably from about 0.01% to about 1% , and still especially from about 0.01% to about 0.7% by weight of the total composition.
5. 5. A composition according to any of claims 1 to 4, wherein the inorganic peroxygen oxidizing agent is hydrogen peroxide.
6. 6. A composition according to any of claims 1 to 5, wherein the total combined level of hair dye oxidative agent is from about 0.001% to about 5%, preferably from about 0.01% to about 4%, with higher preferably from about 0.1% to about 3%, still more preferably from about 0.1% to

   P838 about 1% by weight.
7. 7. A composition according to any one of claims ß, wherein each hair dye oxidative agent is present at a level between about 0.001% to about 3%, preferably between about 0.01% to about 2% by weight .
8. A composition according to any of claims 1 to 7, further comprising one or more buffering agents, preferably an organic compound and / or organic acid having a first pKa below pH 6, selected from: aspartic acid, maleic , tartaric, glutamic, glycolic, acetic, succinic, salicylic, formic, benzoic, malic, lactic, malonic, oxalic, citric, phosphoric and mixtures thereof, more preferably selected from acetic, succinic, salicylic and phosphoric acid and mixtures thereof.
9. 9. A composition according to any of claims 1 to 8, further comprising one or more surfactants selected from anionic, nonionic, cationic, zwitterionic, amphoteric surfactants and mixtures thereof.
10. 10. A composition according to any of claims 1 to 9, further comprising thickeners, stabilizers, antioxidants and / or

    P838 any other cosmetically acceptable material.
11. 11. Use of a composition according to any of claims 1 to 10, for dyeing human or animal hair.
12. 12. A method for dyeing the hair, wherein the hair dyeing mixture is present in a single container suitable for direct application to the hair, wherein the hair dye mixture comprises: (a) an oxidizing agent; and (b) a hair dye oxidative agent; wherein the combined mixture of (a) and (b) has a pH in the range of about 1 to about 5 and wherein the resulting color administered to the hair (Delta E), after at least about 1 month of storage at room temperature is up to about 75%, preferably up to about 85%, more preferably up to about 90% and still more preferably up to about 95% of the total color administered to the hair (Delta E) from a mixture of (a ) and (b) during mixing.
13. 13. A hair dye kit comprising an individually packaged oxidizing component and an individually packaged dye component, wherein

    P838 the oxidizing component comprises an aqueous solution of an inorganic peroxygen oxidizing agent at a level of from about 0.01% to about 3% by weight, having a pH in the range of about 1 to about 6, and the dye component comprises a hair dye oxidative agent, capable of administering a pH solution in the range of about 1 to about 6, at a level of from about 0.001% to about 5% by weight of the composition and wherein the pH of the combined oxidizing agent and of the dye components is in the range of about 1 to about 5.
14. 14. Use of the hair dye kit according to claim 13, for oxidizing and dyeing the hair, wherein the oxidizing agent, the dye oxidation agents. for hair and additional agents are mixed before application to the hair.
15. 15. A method for dyeing hair, wherein a hair dye composition is present as components (a) and (b) packaged separately and wherein the hair dye composition comprises: (a) of about 0.0003 moles (per lOOg of the composition) to less than about 0.2 moles (per lOOg of the composition) of an oxidizing agent wherein the pH of (a) is in the range of about 1 to

    P83S approximately 6; and (b) an oxidative hair dyeing agent wherein the pH of (b) is in the range of about 1 to about 6; wherein each of (a) and (b), when in the form of the target use, are stable at pHs in the range of about 1 to about 6 and wherein the combined dyeing mixture of the hair of (a) and (b) is stable with time and has a pH in the range of about 1 to about 5, and wherein the resulting color delivered to the hair (Delta E), after at least about 1 month of storage at room temperature is up to about 75%, preferably up to about 85%, more preferably up to about 90% and still more preferably up to about 95% of the total color administered to the hair (Delta E) from a mixture of (a) and ( b) during mixing.
16. 16. A process capable of administering a reddish tint to the hair, comprising: applying to the hair a composition according to any of claims 1 to 10, comprising: (i) from about 0.01% to about 3% by weight of a inorganic peroxygen oxidizing agent; Y

    P838 (ii) from about 0.001% to about 5% by weight of a hair dye oxidative agent, and mixtures thereof; where untreated hair is light brown hair, previously bleached, previously with permanent, having L, a, b values of approximately 60, 9 and 32 and where the initial tone of the dyed hair has a hue or tone value ( tangent arc of (b / a)) in the range of from about 25 to about 70, preferably from about 30 to about 65, more preferably from about 35 to about 60 and wherein the initial color intensity (L) is greater from about 10 and less than about 70, preferably greater than about 15 and less than about 65, more preferably greater than about 20 and less than about 60 and wherein the delta fading E is less than about 5.0, preferably less than about 4.5, more preferably less than about 4.0 and wherein the change in hair color,% delta E, after up to 20 washes, is less than about 2 0%, and preferably less than about 15%, more preferably less than about 10%.
17. 17. A process capable of administering a brown or black tone to the hair, which includes: applying to the hair a

    P838 composition according to any of claims 1 to 10, comprising: (i) from about 0.01% to about 3% by weight of an inorganic peroxygen oxidizing agent; and (ii) from about 0.001% to about 5% by weight of a hair dye oxidative agent, and mixtures thereof; wherein the untreated hair is light brown hair, previously decolorized, previously with permanent, having values L, a, b of approximately 60, 9 and 32 and where the initial tone of the dyed hair has a value of hue or tone ( tangent arc of (b / a)) of less than about 25 preferably less than about 20, and wherein the initial color intensity (L) is greater than about 1 and less than about 50, preferably greater than about 5 and less than about 45, and wherein the fading delta E is less than about 2.3, preferably less than about 2.0, more preferably less than about 1.7, and wherein the change in hair color,% delta E, after 20 washes, is less than about 5%, preferably less than about 4.5%, more preferably less than about 4%, and still more preferably less

    P838 of approximately 3.5%.
18. 18. A process capable of administering a light brown tone to the hair, comprising: applying to the hair a composition according to any of claims 1 to 10, comprising: (i) from about 0.01% to about 3% by weight of an agent inorganic peroxygen oxidant;

    And (ii) from about 0.001% to about 5% by weight of a hair dye oxidative agent, and mixtures thereof; wherein the untreated hair is light brown hair, previously decolorized, previously with permanent, having values L, a, b of approximately 60, 9 and 32 and where the initial tone of the dyed hair has a value of hue or tone ( tangent arc of (b / a)) in the range of about 70 to about 110, and wherein the initial color intensity (L) is greater than about 20 and less than about 95, preferably greater than about 25 and less than about 90, and wherein the delta fading E is less than about 2.6, preferably less than about 2.3, and wherein the change in hair color,% delta E, after up to 20 washes, is less than about 15% , preferably less than

    P838 about 12%, more preferably less than about 10%, and still more preferably less than about 18%.
19. 19. Use of a composition according to any of claims 1 to 10, for dyeing textile and / or fibrous substances.

    P838