WO2013179124A2

WO2013179124A2 - Cosmetic composition for skin cleansing and method for its production

Info

Publication number: WO2013179124A2
Application number: PCT/IB2013/001096
Authority: WO
Inventors: Loris TRAMARIN
Original assignee: Tramarin Loris
Priority date: 2012-05-30
Filing date: 2013-05-29
Publication date: 2013-12-05
Also published as: ITMI20120937A1; WO2013179124A3

Abstract

The present invention relates to a cosmetic composition for skin cleansing comprising wood ash and at least one fatty acid and/ or a derivative thereof heated or boiled in water. This cosmetic composition may be used in a effective and safe manner as a skin and/ or scalp cleanser in particular for removing stains or marks due to the residues of hair coloring, for example hair dyeing residues. Moreover, this cosmetic composition may be used in a effective and safe manner also for peeling.

Description

Title: Cosmetic composition for skin cleansing and method for its production

DESCRIPTION

Field of application

The present invention relates to the sector of the cosmetics industry.

In particular, the present invention relates to a cosmetic composition for skin cleansing having a stain-removing action which is able to remove residues of cosmetic products, such as dyes and the like, from the skin and/ or the scalp.

Moreover, the present invention also relates to a method for obtaining a composition of the aforementioned type.

Prior Art

As is known, hair coloring or dyeing is a well-known practice in cosmetics and is widely used both within the home and in particular on a professional level.

This practice is used for many purposes including covering up gray hair, restoring cosmetic color which has become "bleached" as a result of other treatments, or more frequently for creating a new look by means of a change in color of the hair.

There exist various techniques, sometimes fairly complex in nature, which may be used to perform hair coloring or dyeing depending on the result to be achieved. Generally speaking, hair coloring or dyeing envisages the application, onto the hair and the scalp, of a coloring product such as a cream, a gel or shampoo with coloring effect, followed, after a predetermined pause for allowing the coloring substances to take effect on the hair structure, by rinsing of the hair in order to eliminate the excess dye. Subsequently it is possible to apply, for example a cream, which may act also as a protective mask, making the hair soft and shiny. After a predefined time period, the hair is rinsed again and a perm may then be performed on the hair.

It is also known that, during the hair dyeing operations, the coloring substances used interact not only with the hair, but also with the skin of the scalp (i.e. at the hair roots) or in the vicinity thereof (in particular on the forehead), forming stains or marks which are particularly difficult to remove, at the end of the dyeing process, by washing the hair with normal products (in particular shampoo) intended for this purpose.

Therefore, various stain-removing products, specifically designed to remove from the skin stains or marks due to dyeing residues, are known to exist on the market.

However, these stain-removing products, although generally being satisfactory, usually are based on synthetic chemical substances, in particular as regards their active principles, such that these products have a significant impact on the environment following their use, and the costs for producing them may also be high.

Moreover, the synthetic substances which form these stain- removing products may be particularly aggressive and therefore cause irritation and/ or an allergic reaction during and/ or after the use of the aforementioned stain-removing products on the skin and /or on the scalp.

The patent application US 2006/293207 describes a cosmetic composition comprising tobacco ash as its main component and other secondary components including fatty acid derivatives. The composition is said to be suitable for removing from the skin or scalp stains resulting from coloring of the skin.

Patent application RU 2074707 describes a composition comprising wood ash, lemon juice, water and other ingredients. This composition is said to be suitable for removing hairs from the skin and does not require prior heating before application.

Patent application DE 4320523 describes a composition for the treatment of scabies in horses comprising 30-50% by weight of wood ash, 20-40% by weight of a fat as well as oils and perfumes.

The technical problem underlying the present invention is therefore that of providing a stain-removing cosmetic composition based mainly on natural substances which may be produced at a low cost and is able, at the same time, to remove residues of cosmetic products, in particular coloring substances such as dyeing residues and the like, from the skin and/ or scalp in an effective and safe manner for the user, so as to overcome the drawbacks mentioned above with reference to the prior art.

Summary of the invention

This technical problem is solved according to the present invention by a cosmetic composition for skin cleansing obtainable by heating or boiling a mixture comprising water, wood ash, at least one fatty acid selected from aliphatic mono or polycarboxylic acids with straight or branched chain having a number of carbon atoms ranging from 1 to 30 and/ or derivatives thereof.

This composition may be obtained according to the present invention by a method comprising the steps of:

- providing ash obtained from the burning of wood,

- mixing water, said ash and at least one fatty acid selected from aliphatic mono or polycarboxylic acids with straight or branched chain having a number of carbon atoms ranging from 1 to 30 and/or derivatives thereof in predetermined ratios, obtaining a mixture, - heating or boiling said mixture with simultaneous stirring for a predetermined period of time.

According to an embodiment of the invention, the method further comprises the step of packaging the heated and boiled mixture in at least one container in predetermined doses. Preferably, the packaging of said boiled mixture is carried out hot.

Detailed description

The term "wood ash" is understood as meaning the solid residue resulting from the complete combustion, or also partial carbonization, of vegetable plants of any kind and of any part of the said plants (trunks, branches, leaves, roots, bark) or also wood. Preferably, the ashes which may be used in the cosmetic composition according to the invention are derived from the complete combustion or carbonization, also partially, of fire wood. In this connection, it is preferable to use ash derived from the combustion or carbonization of oak, beech and/ or eucalyptus wood.

Preferably, in the composition according to the invention, the weight ratio between the weight of the ash and the weight of the at least one fatty acid and/ or a derivative thereof is in the range of 5: 1 to 1:2, and in particular 3: 1 to 1 :2.

As regards the fatty acids which may be used in the composition according to the invention, it must be said that they comprise any aliphatic mono or polycarboxylic acid with straight or branched chain having a number of carbon atoms ranging from 1 to 30, preferably an aliphatic mono or polycarboxylic acid having a number of carbon atoms ranging from 8 to 25, in particular from 12 to 22. The fatty acid may be saturated or unsaturated, i.e. having in its straight or branched chain at least one double carbon-carbon bond in the cis or trans configuration and having optionally at least one triple carbon-carbon bond. When there is more than one double or triple carbon-carbon bond in the straight or branched aliphatic chain, these bonds may be conjugated or non- conjugated.

In the composition according to the invention, it is also possible to use derivatives of the carboxylic acid of the aforementioned fatty acids such as, in particular, salts (soaps), esters, aromatic derivatives as well as pure combinations of fatty acids and derivatives of fatty acids. In particular, suitable esters comprise monoglycerides, diglycerides and triglycerides of carboxylic acids C 1-C30, ethylene glycol monoesters of carboxylic acids C 1-C30, ethylene glycol diesters of carboxylic acids Cl- C30, propylene glycol monoesters of carboxylic acids C 1-C30, and propylene glycol diesters of carboxylic acids C1-C30.

Preferably, the at least one fatty acid which may be used in the composition according to the invention is selected from saturated or unsaturated aliphatic monocarboxylic acids in particular of natural origin. Representative examples of these fatty acids comprise oleic acid, stearic acid, isostearic acid, lauric acid, myristic acid, isomyristic acid and palmitic acid, isopalmitic acid, behenic acid, linoleic acid and linolenic acid. Of these, lauric acid, myristic acid, isomyristic acid, isopalmitic acid, isostearic acid, oleic acid, linoleic acid and linolenic acid are preferred owing to their cleansing efficiency with regard to the removal of stains or marks.

Depending on the content of water used for heating or boiling and the fatty acid or derivative thereof, the cosmetic composition according to the invention may have a liquid, solid or semi-solid consistency. For example, it may be in the form of a suspension, paste, cream, ointment or gel.

Moreover, it is important that the cosmetic composition should have an alkaline pH, preferably between 10 and 14, and in particular between 1 1 and 14. This pH refers equally well either to the pH measured directly in the cosmetic composition (for example in the case of a composition with a liquid or semi-solid consistency) or to the pH of the cosmetic composition diluted in water.

Despite the fact that the pH of the cosmetic composition according to the invention tends to be high, it has been found surprisingly that the composition according to the invention is not particularly aggressive when applied to the skin and/ or scalp in order to remove therefrom residues or marks of coloring products, such as hair dyes and the like, in the manner which will be explained more fully in the continuation of the description.

Considering that the alkalinity is derived essentially from mineral salts such as oxides (for example calcium oxide) and carbonates, in which ash is rich, adjustment of the pH in the composition according to the invention may be performed advantageously by means of the addition of a fatty acid and/ or derivative thereof in the due proportions as required. At the same time, the fatty acid influences the final consistency of the composition such that the quantity of the at least one fatty acid and/or derivative thereof may be adjusted to obtain a suitable combination of consistency and stain-removing characteristics according to specific needs which may arise.

It should also be noted, advantageously, that the composition according to the invention consists essentially (or at least mainly) of components which are natural or of natural origin such that it has a reduced environmental impact. Moreover, it may produced at a cost lower than that of functionally equivalent conventional products based on synthetic substances, considering in particular that the composition according to the invention, in addition to using natural components, also advantageously allows the recycling of processing rejects such as ash, which normally cannot be used and are disposed of as waste.

The cosmetic composition according to the invention is particularly effective for the removal of stains or marks due to the residues of coloring substances (in particular hair dyes), while at the same time being very simple and safe to use for the user.

These stains and marks may in fact be removed effectively by providing small quantities of the composition according to the invention on an application substrate (for example piece of cotton or fabric) and then applying the composition according to the invention on the skin portion to be cleansed with small delicate rotational movements so as to clean the skin. Alternatively, a suitable quantity of the composition according to the invention may be distributed on the part to be cleansed, for example along the hair roots where the dyeing residues remain, and the skin then cleaned with a cotton wad or a piece of fabric performing small delicate rotational movements in the zone affected by the stains. This is then followed by careful cleansing and rinsing of the treated skin portion.

During such an application, in addition to removing effectively stains or marks left on the skin by the coloring products (for example hair dyes) the composition according to the invention exerts a balanced action on the skin, thus being not particularly aggressive to the point of causing serious damage to the user's skin, such as lesions and/or allergic reactions. Depending on the type of skin and in particular in the case of sensitive skin, possible reddening and/ or slight abrasions may occur, but this occurs only if the composition according to the invention is rubbed vigorously on the skin. In any case, it may be useful to test the composition of the invention before use, applying it onto a small skin portion in a skin area which is not particularly sensitive, in order to determine the presence of any allergic reactions and/ or particular sensitivity.

Without being bound by any particular scientific theory, it is considered that the advantageous and innovative characteristics possessed by the cosmetic composition according to the invention, as specified above, are the result of the synergic action of its components. In particular, it is considered that, owing to heating or boiling of the components in water, the ash is able to exert a delicate abrasive action on the skin which favors removal of stains or marks, while at the same time the fatty acid and/ or derivative thereof exerts a cleansing action which also helps to remove stains and marks in combination with the ash, as well as a softening action on the skin.

It should also be noted that the cosmetic composition according to the invention is formed essentially by components of natural origin, thus favoring improved compatibility with regard to application on the human skin and greater bio-degradability compared to functionally equivalent conventional products based on or containing substances of synthetic origin.

The composition according to the invention, owing to its beneficial properties as specified above, may be used not only for the removal of coloring substances, but also advantageously for the cosmetic treatment of the skin in general.

In particular, the composition according to the invention may be used to perform the cosmetic treatment of peeling, namely treatment for removing a surface layer of the skin in order to eliminate impurities, to favor breathing of the skin and /or to improve the general state of health of the skin. The cosmetic composition according to the invention may optionally comprise at least one functional additive in addition to the wood ash and the at least one fatty acid and/ or derivative thereof heated or boiled in water. The functional additive or additives is/are chosen from those which are commonly used in cosmetic preparations and may be introduced so as to provide the cosmetic composition of the invention with further properties or heighten the properties of its essential components depending on specific requirements, provided that they are compatible with application onto the skin.

These functional additives may be added, in predefined proportions, to the mixture of ash, water and at least one fatty acid and/ or derivative thereof before heating or boiling or after heating or boiling in the case of thermolabile additives.

Examples of these optional additives include natural oils, essential oils, inorganic materials in powder form, pigments, alcoholic substances, antiseptic agents, antibacterial agents, perfumes, antioxidants, emollients, pH adjusting agents, chelating agents, bleaching agents, refreshing substances, etc.

The natural and /or essential oils may be chosen from among those which are commonly used in cosmetic preparations such as coconut oil, avocado oil, sesame oil, rice germ oil, etc.

Examples of inorganic materials in powder form include salts and inorganic materials such as talc, kaolin, mica, calcium or magnesium carbonates, titanium dioxide, zinc oxide, iron oxides, etc. Particularly preferred is the use of titanium dioxide which provides the composition according to the invention with bleaching properties. The titanium oxide may be present in quantities ranging from 10% to 100% by weight relative to the weight of the wood ash. The alcoholic substances are preferably soluble in water and include polyalcohol alcohols such as propylene glycol, 1,3-butylene glycol, dipropylene glycol, isoprene glycol, glycerin, diglycerin, polyglycerin, trimethylolpropane, pentaerythritol, sorbitan, glucose, sorbitol, maltose, saccharose, trehalose, xylitol, etc.

Examples of antiseptic agents include paraoxybenzoates, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate and phenoxyethanol.

Examples of antibacterial agents include benzoic acid, salicylic acid, phenol, sorbic acid, paraoxybenzoic acid esters, p-chloro meta- cresol, etc.

Examples of antioxidants include tocopherol, butylhydroxyanisole (BHA) and butylhydroxytoluene (BHT).

Examples of pH adjusting agents include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, malonic acid, potassium carbonate, sodium bicarbonate and ammonium bicarbonate.

Examples of chelating agents include phosphoric acid, EDTA (ethylenediaminetetraacetic acid), alanine, sodium polyphosphate and sodium metaphosphate.

Examples of refreshing agents include L-menthol and camphor.

The perfumes may consist of fragrant extracts of natural origin obtained for example from flowers, fruits, herbs, etc, such as extracts of lavender, lily-of-the-valley, mimosa, bergamot, coconut, strawberry, lemon.

The emollients, where provided, in combination with the fatty acids help soften the skin and prevent the formation of inflamed areas or irritation during use of the cosmetic composition according to the invention. Examples of such emollients include C12-C15 alkyl benzoates, dimethicone, squalane, etc.

As regards the method of preparation of the cosmetic composition according to the invention, during a first step ash obtained from the combustion or (partial) carbonization of wood is provided. This ash may undergo sieving in order to obtain a particle size within a predefined range, preferably between 0.01 microns and 2000 microns.

The ash is then mixed with water, at least one fatty acid or derivative thereof and any functional additives in predefined ratios, using for example suitable mixers conventional per se.

Preferably, the quantity of water is added in a weight ratio of water and ash of between 1 :2 and 3: 1.

Instead, the whole quantity of the at least one fatty acid and/ or derivative thereof is added preferably in a weight ratio, between the weight of the ash and the weight of the at least one fatty acid and/ or a derivative thereof, in the range of 5: 1 to 1 :2, and preferably 3: 1 to 1 :2.

According to a preferred embodiment, 25-50% of water, 25-50% of wood ash and 10-25% of fatty acid are mixed, in percentages by weight relative to the weight of the mixture.

Optionally, if desired, it is possible to add to the aforementioned mixture also one or more functional additives as specified above in variable proportions as known in the art and depending on specific requirements. The mixture thus obtained is then subjected to heating or boiling, for example in a boiler conventional per se, for a predefined time period, preferably between 30 minutes and 90 minutes. The heating or boiling temperature is preferably between 50°C and 100°C, in particular between 80°C and 100°C. Boiling is performed with continuous stirring of the mixture so as to obtain a substantially homogeneous product with the ash dispersed in a substantially uniform manner in the at least one fatty acid and/ or derivative thereof and may result in the loss, due to evaporation, of at least part of the water present in the initial mixture before boiling or during boiling.

At the end of heating and/ or boiling the composition according to the invention is obtained and, depending on the type and quantity of fatty acid and/ or derivative thereof and the quantity of residual water, it may assume a different consistency which may be liquid, solid or semisolid, for example a suspension, gel, paste, cream, etc.

The composition according to the invention obtained at the end of heating or boiling may be left to cool or cooled using means which are conventional per se and may be used directly or may be packaged in suitable containers and in predetermined doses.

These containers may be of the rigid, semi-rigid or soft type depending on the consistency of the composition according to the invention and may have any form. Examples of such containers include small jars, tubes, bags, etc.

Packaging is performed preferably using volumetric metering devices suitable for dispensing dense or medium-density products, namely products with a medium or high viscosity.

The apparatus may comprise a loading hopper which is connected to a metering device of the pneumatic type provided with rotary, preferably 3-way valve, and rotor, preferably of the conical type for viscous products, which are controlled by suitable drive means for metering predetermined volumes of product. The apparatus may also comprise a nozzle for dispensing these predetermined volumes which is in fluid communication with the metering device.

The loading hopper may be substantially cylindrical with a conical base and may be provided with a lid. Moreover, said hopper is preferably provided with heating means (for example the hopper may have a twin wall with a jacket heated by a special resistance) for keeping the product to be metered at a predetermined temperature (hot packaging) and stirring means (for example a mixer equipped with a mechanical speed variator) for keeping the product to be metered continuously stirred.

The metering apparatus is also provided with means for operating and controlling the metering device, the heating means and the stirring means, as well as with a display, for example of the digital type, for setting and checking the functional operating parameters of the apparatus.

A metering apparatus as described above may be used for packaging product doses ranging between 5 ml and 250 ml or for packaging larger product doses, for example ranging between 250 ml and 1000 ml.

The present invention will now be described with the aid of a number of purely non-limiting examples of embodiment.

Example 1

1 kg of beech wood sieved using a circular sieve so as to obtain particles with dimensions preferably of between 0.1 microns and 2000 microns were mixed while continuously stirring with 0.820 kg of water and 0.390 kg of oleic acid. Mixing was performed in a steel container provided with a stirrer, while adding the ash and oleic acid to the water previously heated to a temperature of 90°C. The resultant mixture was kept at a temperature of between 50°C and 100°C again with stirring for 1 hour.

Then the mixture was cooled, thus obtaining a cosmetic composition according to the invention in the form of a paste. This cosmetic composition (with or without cooling at the end of boiling) may be packaged preferably hot, by means of a metering apparatus as described above, in special containers, for example small jars. The packaging doses may vary for example between 5 ml and 250 ml and/or between 250 ml and 1000 ml.

The cosmetic composition thus prepared was tested on different persons who had undergone beforehand hair coloring each using a professional commercial dye chosen from Majirel, Inoa, Dia Light and Dia Richesse by L'Oreal Professionnel or Framcolor 2001 and Framcolor 221 of Framesi S.p.A. and who, after rinsing of the excess dye, had dyeing stains on their forehead and /or scalp.

In particular, the composition according to the invention was applied to each person by placing small quantities of the composition on a cotton wad and then applying it onto the skin and/ or scalp portion to be cleansed by means of small delicate rotational movements so as to clean the skin. This was then followed by careful cleansing and rinsing of the treated skin portion.

The cosmetic composition according to the invention was able to remove effectively the stains of the sample tested from each person, being both "delicate" and in any case not particularly aggressive to the point of causing serious damage to the user's skin, such as lesions and/ or allergic reactions. In the case of more vigorous application onto sensitive skin, slight reddening may occur, which however does not give rise to a burning sensation on the treated skin parts and which may be partly also due to the preceding dyeing operation.

Example 2 (comparative)

1 kg of beech wood ash sieved using a circular sieve so as to obtain particles with dimensions preferably of between 0.1 microns and 2000 microns were mixed while continuously stirring with 0.820 kg of water and 0.390 kg of oleic acid. Mixing was performed at room temperature in a steel container provided with a stirrer for a sufficient amount of time to obtain a paste.

The paste thus prepared was tested directly on different persons who had undergone beforehand hair coloring each using a professional commercial dye chosen from Majirel, Inoa, Dia Light and Dia Richesse by L'Oreal Professionnel or Framcolor 2001 and Framcolor 221 of Framesi S.p.A. and who, after rinsing of the excess dye, had dyeing stains on their forehead and / or scalp.

In particular, the paste was applied to each person by placing small quantities of the paste directly onto the skin in the region of the hair roots or on a cotton wad and then applying the paste onto the skin and/ or scalp portion to be cleansed by means of small delicate rotational movements so as to clean the skin. This was then followed by careful cleansing and rinsing of the treated skin portion.

Although the paste was able to remove the stains of the sample tested from each person, it was particularly "aggressive" and in particular was abrasive to the point of causing significant inflammation and/ or lesions on the part of the skin and/ or scalp to which the paste had been applied.

Example 3

A cosmetic composition was prepared in accordance with the method described in Example 1, except for the fact that the starting mixture which was boiled contained 1 kg of ash, 0.820 kg of water, 0.390 kg of oleic acid and 0.1 kg to 1 kg of titanium dioxide. The cosmetic composition thus prepared was tested on various persons who had undergone beforehand hair coloring each using a professional commercial dye chosen from Majirel, Inoa, Dia Light and Dia Richesse by L'Oreal Professionnel or Framcolor 2001 and Framcolor 221 of Framesi S.p.A. and who, after rinsing of the excess dye, had dyeing stains on their forehead and /or scalp.

The cosmetic composition according to the invention was able to remove effectively the stains of the sample tested from each person, being both "delicate" and in any case not particularly aggressive to the point of causing serious damage to the user's skin, such as lesions and /or allergic reactions. In the case of more vigorous application onto sensitive skin, slight reddening may occur, which however does not give rise to a burning sensation on the treated skin parts and which may be partly also due to the preceding dyeing operation. Moreover, a bleaching effect was obtained on the skin owing to the titanium dioxide contained in the composition according to the invention.

Claims

1. Cosmetic composition for skin cleansing obtainable by heating or boiling a mixture comprising water, wood ash, at least one fatty acid selected from aliphatic mono or polycarboxylic acids with straight or branched chain having a number of carbon atoms ranging from 1 to 30 and/ or derivatives thereof.

2. Cosmetic composition according to claim 1, wherein the weight ratio between the weight of the ash and the weight of the at least one fatty acid and/or a derivative thereof is in the range of 5: 1 to 1 :2, and preferably 3: 1 to 1 :2.

3. Cosmetic composition according to claim 1 or 2, wherein said composition has an alkaline pH, said pH being preferably between 10 and 14.

4. Cosmetic composition according to any one of the preceding claims, wherein said at least one acid and/ or derivative thereof is selected from aliphatic mono or polycarboxylic acids with straight or branched chain having a number of carbon atoms ranging from 8 to 25, preferably from 12 to 22, and from carboxylic acid derivatives, preferably salts, esters or aromatic derivatives of said aliphatic mono or polycarboxylic acids.

5. Cosmetic composition according to claim 4, comprising at least one aliphatic monocarboxylic acid and/ or a derivative thereof, said aliphatic monocarboxylic acid being selected from the group comprising oleic acid, stearic acid, isostearic acid, lauric acid, myristic acid, isomyristic acid and palmitic acid, isopalmitic acid, behenic acid, linoleic acid and linolenic acid.

6. Cosmetic composition according to any one of the preceding claims further comprising at least one functional additive selected from the group comprising inorganic materials in powder form, pigments, alcoholic substances, antiseptic agents, antibacterial agents, perfumes, antioxidants, emollients, pH adjusting agents, chelating agents, bleaching agents and refreshing substances.

7. Composition according to claim 6, wherein said functional additive is selected from titanium dioxide, glycerin and combinations thereof.

8. Method for the preparation of a cosmetic composition according to any one of the preceding claims, comprising the steps of:

- providing ash obtained from the burning of wood,

- adding water, said ash and at least one fatty acid selected from aliphatic mono or polycarboxylic acids with linear or branched chain having a number of carbon atoms ranging from 1 to 30 and/ or derivatives thereof in predetermined ratios, obtaining a mixture,

- heating or boiling said mixture with simultaneous stirring for a predetermined period of time.

9. Method according to claim 8, further comprising the step of packaging the heated or boiled mixture in at least one container in predetermined doses, said packaging of said heated or boiled mixture being preferably carried out hot.

10. Method according to claim 8 or claim 9, wherein the amount of water is added in a weight ratio of water and ash of between 1 :2 and 3: 1, while the whole quantity of the at least one fatty acid and / or derivative thereof is added in a weight ratio, between the weight of the ash and the weight of the at least one fatty acid and /or a derivative thereof, in the range of between 5: 1 and 1 :2, and preferably between 3: 1 and 1 :2 .

1 1. Method according to any one of claims 8 to 10, wherein said mixture is obtained by mixing 25-50% of water, 25-50% of wood ash and 10-25% of fatty acid, in percentages by weight relative to the weight of the mixture.

12. Method according to any one of the preceding claims 8 to 11, comprising the addition of at least one functional additive to said mixture before and/or after said boiling step.

13. Method according to any one of the preceding claims 8 to 12, wherein said heating or boiling is carried out at a temperature of between

50°C and 100°C for a time of between 30 minutes and 90 minutes.

14. Use of a cosmetic composition according to any one of claims 1 to 7 as a cleansing agent for the skin and /or the scalp in particular for the removal of stains or marks due to residues from hair coloring.

15. Use of a cosmetic composition according to any one of claims 1 to

7 for peeling of the skin.