JP5709449B2 - Method for dyeing human hair - Google Patents

Description

  The present invention relates to a method for dyeing human hair, and more particularly to a method for dyeing human hair, in which dyeing is performed using a photosensitive hair dye containing a silver salt and a hair treatment and hair dyeing composition.

  At present, in the hair color market, the so-called hair dyes, which are oxidative hair dyes using an oxidative dye and hydrogen peroxide, are mainly used because they are easy to operate, rich in color tone, and excellent in hair dyeing effect. However, those containing oxidative dyes, particularly diamine dyes, may cause skin irritation or allergy.

  As other hair dyes, semi-permanent hair dyes such as color treatments containing direct dyes are on the market. Although this semi-permanent hair dye is inferior to an oxidative hair dye in terms of dyeability, it is simple and easy to use, so it has a strong popularity among people who cannot use an oxidative dye.

  On the other hand, as hair dyes, those using silver salts have been known for a long time (for example, Patent Documents 1 to 9). Patent Document 1 describes a hair dye composed of a substrate material having moisture, and silver sulfate and citric acid mixed with the substrate material. Patent Document 2 describes a one-component hair dye using light energy, in which a silver salt and an amino acid are blended into a hair dye cream base. Patent Document 3 discloses a hair dye composition comprising a viscous liquid containing a silver salt-containing component (a) in a physiologically acceptable medium and a component (b) containing a reducing agent simultaneously or separately. Have been described. Patent Document 4 discloses a silver colloid-L-amino acid complex solution produced by mixing an L-amino acid such as L-histidine with a silver colloid solution produced by mixing silver finely divided to a set particle size or less into a liquid. The hair dye characterized by using is described. Patent Document 5 describes a hair dye which contains a silver salt and a hydrazine compound at the same time, or contains one of the two and is used in combination with an agent containing the other. Patent Document 6 contains an acid dye and a silver salt as essential components, an acid as a pH adjuster, an aromatic alcohol as a penetrating agent, a lower alcohol as a solvent, a polymer compound as a thickener, and sulfur. A photosensitive acidic hair dye composition is described. Patent Document 7 describes a hair dye containing a carboxylic acid silver salt and / or a sulfonic acid silver salt and reductones simultaneously or separately. Patent Document 8 describes a hair dyeing cosmetic containing a silver salt, an organic acid salt, and a dyeable plant powder and / or an extract thereof. Patent Document 9 describes a hair dye composition containing a silver compound, sulfur, a water-soluble polymer substance, and water.

  Hair dyes using silver salts are low in skin irritation or allergenicity, can be used relatively easily, and have the advantage of being able to dye hair in a short time just by irradiating light.

  However, since silver nitrate, which has been widely used as a silver salt, is a raw material for pharmaceuticals, its incorporation into cosmetics and quasi drugs is prohibited. In addition, hair dyes using silver salts sometimes change from black to greenish tones by repeated dyeing. Furthermore, when the permanent treatment is carried out after dyeing with a photosensitive hair dye, the oxide is reduced again by the reducing agent contained in the permanent agent, resulting in a problem that the color tone is light and yellowish. Further, when an oxidation hair dye is used after dyeing with a photosensitive hair dye, there is a problem that the color changes to green. In these phenomena, not only a change in color tone occurred, but also a tendency for the hair to feel dry. Furthermore, hair dyes using silver salts have the disadvantage that they can only be used as white hair dyes because they cannot produce variations in color.

  With respect to the problem of color change that occurs when such photosensitive hair dyes are used, the occurrence of trouble has been prevented by making a note on the package or the like. For this reason, there has been a demand for a staining method capable of exhibiting a stable and stable coloring property even when repeatedly applied. Further, a method for repairing troubled hair to a desired color tone has been desired.

Japanese Patent No. 3881688 Japanese Patent No. 4184385 JP 2009-96786 A JP 2008-280321 A JP 2008-247842 A JP 2008-0669131 A JP 2008-050340 A JP 2006-176486 A JP-A-2005-060354

  Accordingly, the present invention is a method for dyeing human hair, which has low skin irritation or allergenicity, exhibits durable and stable coloring characteristics even when repeatedly applied, and can be dyed in various colors without damaging the hair. The purpose is to propose.

  As a result of intensive studies in view of the above circumstances, the present inventors have used a photosensitive hair dye containing a silver salt composed of silver sulfate, silver lactate, and silver citrate, and then used a basic dye. And / or hair treatment and dyeing containing HC dye, one or more selected from alkylamine compounds, quaternized ammonium compounds, amidoamine-based cationic surfactants, and oxyacids By applying the composition, it has been found that the skin irritation or allergenicity is low, and it exhibits a stable and stable coloring property even after repeated application without damaging the hair and can be dyed in various colors. The invention has been completed.

  That is, the present invention provides the following method for dyeing human hair.

  Item 1. Human hair contains one or more silver salts selected from the group consisting of silver sulfate, silver lactate, and silver citrate, and the content of the silver salt is 0.01 to 2 in the total amount of the hair dye. After dyeing by applying a photosensitive hair dye having a pH of 1 to 5 in mass%, selected from a basic dye and / or HC dye, an alkylamine compound, a quaternized ammonium compound, and an amidoamine compound A method for dyeing human hair, comprising applying a hair treatment and hair dye composition containing one or more cationic surfactants and an oxyacid.

Item 2. (A) 1 type or 2 or more types of silver salt selected from the group which consists of silver sulfate, silver lactate, and silver citrate is contained, and content of silver salt is 0.01-2 mass% in hair dye whole quantity. And applying a photosensitive hair dye having a pH of 1 to 5 to human hair,
(B) a step of dyeing hair to which the photosensitive hair dye is applied by leaving it under a light source;
(C) rinsing the dyed hair with water and / or washing with shampoo;
(D) One or two or more cationic interfaces selected from the group consisting of a basic dye and / or HC dye, an alkylamine compound, a quaternized ammonium compound, and an amidoamine compound. Applying a hair treatment and hair coloring composition comprising an active agent and an oxyacid, and (e) rinsing the treated hair with water and / or washing and drying with shampoo,
Item 2. A method for dyeing human hair according to Item 1, which comprises

  Item 3. The photosensitive hair dye further comprises diethylenetriaminepentaacetic acid, hydroxyethanediphosphonic acid, edetic acid, (2S, 2'S) -2,2 '-(ethylenebisimino) bissuccinic acid, 1,3-diamino-2- One or more selected from the group consisting of propanol-N, N, N ′, N′-tetraacetic acid, N, N-di (2-hydroxyethyl) glycine, and nitrilotris (methylenephosphonic acid) Item 3. The method for dyeing human hair according to Item 1 or 2, wherein the chelating agent is contained in an amount of 0.01 to 5% by mass in the total amount of the hair dye.

  Item 4. The human hair according to any one of Items 1 to 3, wherein the photosensitive hair dye further contains bamboo vinegar and / or wood vinegar in a total amount of 0.1 to 20% by mass in the total amount of the hair dye. Dyeing method.

  Item 5. 5. A method for repairing the color tone of a troubled hair using the method for dyeing human hair according to any one of items 1 to 4.

  According to the present invention, the skin irritation or allergenicity is low and can be dyed in various colors by a simple method, exhibiting a stable and stable coloring property even when repeatedly applied without damaging the hair. . Furthermore, according to the present invention, the color tone of the hair having trouble can be repaired to a desired color tone.

  In the present invention, human hair contains one or more silver salts selected from the group consisting of silver sulfate, silver lactate, and silver citrate, and the content of the silver salt is 0 in the total amount of the hair dye. After dyeing by applying a photosensitive hair dye having a pH of 1 to 5 at 0.01 to 2% by mass, a basic dye and / or HC dye, an alkylamine compound, a quaternized ammonium compound, and an amidoamine A method for dyeing human hair, characterized by applying a hair treatment and hair dyeing composition comprising one or more cationic surfactants selected from system compounds and an oxyacid.

The method for dyeing human hair according to the present invention preferably comprises:
(A) 1 type or 2 types or more selected from the silver salt consisting of silver sulfate, silver lactate, and silver citrate are contained, and the content of the silver salt is 0.01 to 2% by mass in the total amount of the hair dye, a step of applying a photosensitive hair dye having a pH of 1 to 5 to human hair (hereinafter referred to as “step (a)”),
(B) a step of dyeing by leaving the photosensitive hair dye under a light source to which the photosensitive hair dye is applied (hereinafter referred to as “step (b)”)
(C) a step of rinsing dyed hair with water or shampooing with shampoo (hereinafter referred to as “step (c)”),
(D) Washing hair with a basic dye and / or HC dye and one or more selected from an alkylamine compound, a quaternized ammonium compound, and an amidoamine-based cationic surfactant; Applying an acid-containing hair treatment and hair coloring composition (hereinafter referred to as “step (d)”), and (e) rinsing the treated hair with water and / or washing with shampoo. , Drying step (hereinafter referred to as “step (e)”),
including.

  Hereinafter, each step will be described in detail.

  First, in the step (a), one or more silver salts selected from the group consisting of silver sulfate, silver lactate, and silver citrate are contained, and the silver salt content is 0. A photosensitive hair dye having a pH of 1 to 5 and having a pH of 1 to 5 is applied to human hair.

  The photosensitive hair dye used in step (a) uses one or more selected from silver sulfate, silver lactate, and silver citrate as the silver salt. Silver nitrate, which has been frequently used as a silver salt in conventional photosensitive hair dyes, is prohibited from blending into cosmetics and quasi-drugs because it is a raw material for pharmaceuticals, and is difficult to use for general hair dyes. Therefore, silver nitrate is not used as the silver salt, but silver sulfate, silver lactate or silver citrate is used. In these, silver sulfate is preferable at the point which is excellent in the hair dyeing effect. Any of those used as industrial raw materials or those sold as reagents can be used.

  The said silver salt is 0.01 to 2 mass% normally in the hair dye whole quantity, Preferably it mix | blends in the ratio of 0.1 to 1.0 mass%. When the blending ratio of the silver salt is less than 0.01% by mass, a sufficient hair dyeing effect cannot be obtained, and when it exceeds 2% by mass, the silver salt may precipitate in the preparation, which is not preferable.

  The photosensitive hair dye has a pH of 1 to 5, preferably pH 2 to 3.5. If the pH is less than 1, sufficient hair dyeing effect cannot be obtained, and if it exceeds pH 5, the hair dyeing effect is lowered, which is not preferable.

  In order to improve the hair dyeing effect, a chelating agent can be further blended in the photosensitive hair dye. Examples of chelating agents include diethylenetriaminepentaacetic acid, hydroxyethanediphosphonic acid, edetic acid, (2S, 2 ′S) -2,2 ′-(ethylenebisimino) bissuccinic acid, 1,3-diamino-2-propanol-N , N, N ′, N′-tetraacetic acid, N, N-di (2-hydroxyethyl) glycine, nitrilotris (methylenephosphonic acid), hydroxyethylethylenediaminetriacetic acid, phytic acid, polyaspartic acid, polyglutamic acid, asparagine Acid diacetic acid, glutamic acid diacetic acid, sodium polyphosphate, sodium metaphosphate, phosphoric acid, dihydroxyethylglycine, gluconic acid, succinic acid, tartaric acid and the like can be mentioned. Among them, diethylenetriaminepentaacetic acid, hydroxyethanediphosphonic acid, edetic acid, (2S, 2 ′S) -2,2 ′-(ethylenebisimino) bissuccinic acid, 1,3-diamino-2-propanol-N, One or more selected from N, N ′, N′-tetraacetic acid, N, N-di (2-hydroxyethyl) glycine, and nitrilotris (methylenephosphonic acid) are used for formulation stability and hair damage. It is preferable from the viewpoint of difficulty in raising and the hair dyeing effect. However, these chelating agents do not include a salt form because when they become salts, the hair dyeing effect tends to be remarkably reduced.

  As a compounding quantity of a chelating agent, 0.01-5 mass% is preferable in the hair dye whole quantity, and 0.1-1 mass% is further more preferable. When the chelating agent is contained in the hair dye in the range of 0.01 to 5% by mass, a sufficient hair dyeing effect can be exhibited.

  The photosensitive hair dye can further contain bamboo vinegar and / or wood vinegar. Bamboo vinegar and wood vinegar keep the silver salt in the preparation stable and have the effect of penetrating the silver salt or silver ions into the hair. By adding bamboo vinegar and / or wood vinegar to the hair dye, Thus, a photosensitive hair dye having excellent formulation stability and excellent hair dyeing effect can be obtained.

  As the bamboo vinegar, a dry distillation liquid usually obtained as a by-product at the time of bamboo charcoal production from true bamboo, subfamily bamboo, black bamboo, etc. can be used, but impurities were removed by further distillation of the dry distillation liquid, etc. It is preferable to use one. As a compounding quantity of a bamboo vinegar liquid, 0.1-20 mass% is preferable in the hair dye whole quantity, and 1-10 mass% is further more preferable. When the blending amount is less than 0.1% by mass, a sufficient hair dyeing effect cannot be obtained, and when the blending amount exceeds 20% by mass, the odor and the stability of the preparation are deteriorated.

  As the wood vinegar liquid, a dry distillation liquid usually obtained as a by-product during the production of charcoal from oak, kunugi, oak, etc. can be used, but it is preferable to use a liquid obtained by removing impurities by distillation or the like. The blending amount of the wood vinegar is preferably 0.1 to 20% by mass, more preferably 1 to 10% by mass in the total amount of the hair dye. When the blending amount is less than 0.1% by mass, a sufficient hair dyeing effect cannot be obtained, and when the blending amount exceeds 20% by mass, the odor and the stability of the preparation are deteriorated.

  In addition, what is necessary is just to adjust a mixing | blending ratio suitably, when using both bamboo vinegar liquid and wood vinegar liquid for hair dye, so that the total amount may be 0.1-20 mass%.

  Next, in the step (b), the hair to which the photosensitive hair dye is applied is left to stand under an appropriate light source for dyeing. The light source for coloring the photosensitive hair dye is not particularly limited to sunlight, fluorescent lamps, sunlight fluorescent lamps (fluorescent lamps having spectral components close to sunlight), black light, etc. Lamps and black lights are preferred, and fluorescent lamps are particularly preferred. When sunlight is used, care should be taken as it tends to cause uneven coloration when irradiated too intensely. Such light irradiation is sufficient if it is exposed in a natural living environment. The irradiation time may be appropriately adjusted depending on the type of light source used, the light intensity, and the like, but is preferably 5 minutes or more, more preferably about 10 minutes to 15 hours.

  Next, in step (c), the dyed hair is rinsed with water and / or shampooed.

  Next, in the step (d), one or two selected from the group consisting of a basic dye and / or HC dye, an alkylamine compound, a quaternized ammonium compound, and an amidoamine compound is applied to the washed hair. A hair treatment and hair dye composition containing at least one type of cationic surfactant and an oxyacid is applied.

  The basic dye used in the hair treatment and hair dyeing composition used in the step (d) is a dye having a basic functional group such as an amino group or a substituted amino group, and any known one is not limited. Can be used. As the basic dye, water-soluble dyes are preferable. Examples of the basic dye that can be suitably used include Basic Red 2, Basic Red 46, Basic Red 76, Basic Red 118, Basic Blue 7, Basic Blue 26, Basic Blue 99, Basic Violet 10, Basic Violet 14, and Basic Brown. 16, basic brown 17, basic yellow 28, basic yellow 57, and the like. These may be used alone or in combination of two or more.

  The HC dye used in the hair treatment and hair dyeing composition is a neutral dye called a nitro dye. Examples of the HC dye include HC red 1, HC red 3, HC red 7, HC red 10, HC red 13, HC red 14, HC orange 1, HC orange 2, HC orange 3, HC violet 1, and HC violet 2. HC yellow 2, HC yellow 4, HC yellow 5, HC yellow 6, HC blue 2, HC blue 6, HC blue 7, and the like. These are also used alone or in combination of two or more.

  The basic dye and the HC dye are preferably blended in the hair treatment and hair dyeing composition so that the total amount thereof is 0.01 to 2% by mass, and 0.1 to 1% by mass. Further preferred. If the amount is less than 0.01% by mass, a sufficient hair dyeing effect cannot be obtained, and if it exceeds 2% by mass, the dye is difficult to dissolve, which is not preferable.

  The hair treatment and hair dyeing composition preferably contains both a basic dye and an HC dye because variations in hair dyeing color increase.

  The cationic surfactant used in the hair treatment and hair dyeing composition is one or more selected from the group consisting of alkylamine compounds, quaternized ammonium compounds, and amidoamine compounds. The cationic surfactant is preferably blended in the hair treatment and hair dye composition at a ratio of 0.1 to 10% by mass, and more preferably 0.5 to 5% by mass. If it is less than 0.1% by mass, the treatment effect on the hair is insufficient, and satisfactory glossiness and suppleness cannot be obtained. If it exceeds 5% by mass, stickiness or weight may be felt, and the stability of the preparation may be reduced. It is not preferable also from a point.

  Specific examples of the alkylamine compound include, for example, stearylamine, oleylamine, hexadecylamine, octadecylamine, behenylamine, dimethylbehenamine, dimethyl tallowamine, dimethylstearylamine, dimethyltetradecylamine, dimethylhexadecylaquine, dimethyloctadecyl Examples include amines, dimethyl soiamine, dimethyl oleyl amine, dimethyl palmitoamine and the like, and salts thereof. When a salt is formed, either an inorganic acid or an organic acid salt may be used. As the inorganic acid, hydrochloric acid is preferable. As the organic acid, dicarboxylic acids such as maleic acid and succinic acid; hydroxycarboxylic acids such as glycolic acid, lactic acid and malic acid; and acidic amino acids such as glutamic acid are preferable.

  Specific examples of the quaternized ammonium compound include distearyldimethylammonium chloride, dicocoyldimethylammonium chloride, 2-hexyldecyltrimethylammonium chloride, cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, lauryltrimethylammonium chloride, tetradecyltrimethyl Ammonium chloride, lauryloxy-2-hydroxypropyl-trimethylammonium chloride, cocoyl trimethylammonium chloride, soybean trimethylammonium chloride and stearyltrimethylammonium chloride, dimethyldicetylammonium chloride, trimethylcetylammonium bromide, stearyltrimethylammonium chloride, dimethylstearyl chloride Jill ammonium chloride, benzyl tetradecyl dimethyl ammonium chloride or the like.

As an amidoamine compound, for example, the following general formula (I):
R ¹ —CO—NH— (CH ₂ ) _n —N (R ² ) ₂ (I)
(In the formula, n represents an integer of 1 to 5, R ¹ represents a linear or branched saturated or unsaturated fatty acid residue having 9 to 23 carbon atoms, and R ² represents an alkyl group having 1 to 3 carbon atoms. And fatty acid amidoamines represented by:

Specific examples of the fatty acid amidoamine represented by the general formula (I) include lauric acid dimethylaminopropylamide, myristic acid dimethylaminopropylamide, palmitic acid dimethylaminopropylamide, stearic acid dimethylaminopropylamide, and behenic acid dimethylamino. Propylamide, oleic acid dimethylaminopropylamide, palm fatty acid dimethylaminopropylamide, palm fatty acid dimethylaminopropylamide, isostearic acid dimethylaminopropylamide, lauric acid diethylaminoethylamide, myristic acid diethylaminoethylamide, palmitic acid diethylaminoethylamide, stearin Acid diethylaminoethylamide, behenic acid diethylaminoethylamide, oleic acid diethylaminoethylamino , Palm fatty acid diethylaminoethylamide, palm fatty acid diethylaminoethylamide, isostearic acid diethylaminoethylamide, lauric acid diethylaminopropylamide, myristic acid diethylaminopropylamide, palmitic acid diethylaminopropylamide, stearic acid diethylaminopropylamide, behenic acid diethylaminopropylamide, olein Examples include acid diethylaminopropylamide, coconut fatty acid diethylaminopropylamide, palm fatty acid diethylaminopropylamide, and isostearic acid diethylaminopropylamide. Among them, lauric acid dimethylaminopropylamide, myristic acid dimethylaminopropylamide, palmitic acid dimethylaminopropylamide, stearic acid dimethylaminopropylamide, or behenic acid dimethylamino, wherein R ² is a methyl group and n is an integer of 3 Propylamide is preferred.

  An oxyacid is used to adjust the pH of the hair treatment and hair coloring composition. Examples of the oxyacid used in the hair treatment and hair coloring composition include lactic acid, glycolic acid, α-oxybutyric acid, glyceric acid, malic acid, tartaric acid, citric acid, and salicylic acid.

  Since the basic hair dye and / or HC dye is contained in the hair treatment and hair dyeing composition, the pH is usually 3 to 8, and preferably 4 to 6. If the pH is within this range, a sufficient dyeing effect can be obtained, and there is no problem of skin irritation. The pH is adjusted to the above range by blending the oxyacid with the hair treatment and hair dyeing composition.

  Finally, in step (e), the treated hair is rinsed with water and / or washed with shampoo and dried.

  In addition to the above components, the photosensitive hair dye of step (a) and the hair treatment and hair dyeing composition of step (d) are generally other ingredients such as cosmetics and quasi-drugs. Surfactants, fats and oils, humectants, solvents, preservatives, plant extracts, anti-inflammatory agents, natural pigments, fragrances and the like can be appropriately blended.

  As the form of the photosensitive hair dye in the step (a), it can be formulated in a liquid form, a gel form, a cream form, a stick form, an aerosol form, etc. However, it is preferable because the effects of the present invention are easily exhibited. Also in the hair treatment and hair dyeing composition in the step (d), a gel shape or a cream shape is preferable because the effects of the present invention are easily exhibited.

  If the dyeing method of the present invention is used, the skin irritation or allergenicity is low, and even if it is repeatedly applied without damaging the hair, it exhibits a stable and stable coloring property and can be dyed in various colors. Further, by applying the dyeing method of the present invention to the hair having trouble, the color tone of the hair can be repaired to a desired color tone.

  Examples The present invention will be described in detail below by showing examples of the present invention, but the present invention is not limited to these examples.

Example 1
First, human white hair was prepared, and five hair bundles adjusted to about 1 g with a length of about 10 cm were prepared and bleached.

Next, the following steps (a) to (e) are performed on the five hair bundles that have been subjected to bleaching treatment, which is the dyeing method of Example 1.
Step (a) The photosensitive hair dye described in Example 1a in Table 1 is uniformly applied to each hair bundle.
Step (b) This is left for 30 minutes under natural light.
Step (c) The hair bundle is rinsed with water and then washed with a commercial shampoo.
Step (d) The hair treatment and dyeing composition shown in Example 1d of Table 2 is applied to each hair bundle.
Step (e) The hair bundle is rinsed with water and dried.

Comparative Example 1
In the dyeing method of Example 1, the method to which the hair treatment and dyeing composition in step (d) is not applied is used as the dyeing method of Comparative Example 1.

Example 2
Performing the following steps (a) to (e) on five hair bundles obtained by bleaching the same hair bundle as in Example 1 is the dyeing method of Example 2.
Step (a) The photosensitive hair dye described in Example 2a in Table 1 is uniformly applied to each hair bundle.
Step (b) This is left for 30 minutes under natural light.
Step (c) The hair bundle is rinsed with water.
Step (d) The hair treatment and dyeing composition shown in Example 2d of Table 2 is applied to each hair bundle.
Step (e) The hair bundle is washed with a commercially available shampoo and then dried.

Comparative Example 2
In the dyeing method of Example 2, the method to which the hair treatment and hair dyeing composition in step (d) is not applied is used as the dyeing method of Comparative Example 2.

Example 3
The following steps (a) to (e) are performed on the five hair bundles obtained by bleaching the same hair bundle as in Example 1, which is the dyeing method of Example 3.
Step (a) The photosensitive hair dye described in Example 3a in Table 1 is uniformly applied to each hair bundle.
Step (b) Leave for 8 hours under fluorescent light.
Step (c) The hair bundle is rinsed with water and then washed with a commercial shampoo.
Step (d) Next, the hair treatment and hair dye composition shown in Example 3d of Table 2 is applied to each hair bundle.
Step (e) Finally, the hair bundle is rinsed with water and dried.

Comparative Example 3
In the dyeing method of Example 3, a method for applying the hair treatment and dyeing composition in step (d) is referred to as the dyeing method of Comparative Example 3.

Evaluation 1
(1) About the hair | bristle bundle (each 5 pieces each) which repeated the dyeing | staining method (process (a)-(e)) of Examples 1-3, the dyeing | staining state was compared and evaluated visually. (2) About the hair | bristle bundle which evaluated the dyeing | staining state in said (1) (five for each dyeing method), it processed with the commercially available permanent agent, and the dyeing | staining state was compared and evaluated visually.

  Moreover, except performing the dyeing | staining method (process (a)-(c) and (e)) of Comparative Examples 1-3 instead of the dyeing | staining method of Examples 1-3, said (1) and (2) and It processed similarly and compared and evaluated the state of dyeing | staining visually.

Evaluation 2
Of the hair bundles dyed by the dyeing method of Comparative Examples 1 to 3 and subjected to a permanent treatment, the dyeing method of Example 3 is applied once for those in which the color tone of the hair bundle is purplish or discolored. Then, the dyed state was visually compared and evaluated.

Results of Evaluation 1 The hair bundles obtained by repeating the dyeing methods of Examples 1 to 3 were finished in a natural color tone and exhibited sufficient dyeability. After the dyeing method of Examples 1 to 3 was repeated 5 times, no problematic color change was observed for the hair bundle treated with a commercially available permanent agent. Further, even when the hair after the experiment was observed, no change such as hair damage was observed.

  In the hair bundle obtained by repeating the dyeing method of Comparative Examples 1 to 5 five times, all the hair bundles gradually became purple from the fourth time, and changed to an unnatural purple-black color at the fifth time. After the dyeing method of Comparative Examples 1 to 3 was repeated five times, all of the hair bundles treated with a commercially available permanent agent were changed to purplish gray.

Results of Evaluation 2 All of the hair bundles that were subjected to the dyeing method of Example 3 once and re-dyed to the hair bundles that were discolored by the dyeing method and perm treatment of Comparative Examples 1 to 3 were all purple. The color tone of the discolored hair could be repaired to a natural color tone by the dyeing method of Example 3.

  Next, 6 subjects (40 to 50 generations, 4 men, 2 women) who have caused allergies and skin troubles with a general oxidative hair dye, used in the staining method of Examples 1 to 3 The test was conducted. As a result, it was possible to dye the desired color without any skin problems.

  Therefore, by using the human hair dyeing method of Examples 1 to 3, the skin irritation or allergenicity is low, the hair is not damaged, and even when applied repeatedly, it exhibits a stable and stable coloring property, and various It was confirmed that it can be dyed in color.

Claims (4)

Human hair contains one or more silver salts selected from the group consisting of silver sulfate, silver lactate, and silver citrate, and bamboo vinegar and / or wood vinegar, and the content of the silver salt Is 0.01 to 2 % by mass in the total amount of the hair dye, the content of the bamboo vinegar and / or the wood vinegar is 0.1 to 20% by mass in the total amount of the hair dye, and the pH is 1 to 5. After dyeing by applying a hair dye, one or more cationic surfactants selected from basic dyes and / or HC dyes, alkylamine compounds, quaternized ammonium compounds, and amidoamine compounds A method for dyeing human hair, comprising applying a hair treatment and hair dye composition containing an agent and an oxyacid. (A) silver sulfate, one or more silver salts selected from the group consisting of silver lactate, and silver citrate, and containing vinegar solution and / or wood vinegar, the content of the silver salt Photosensitive dyeing in which the content of the bamboo vinegar and / or the wood vinegar is 0.1 to 20% by mass in the total amount of the hair dye, and the pH is 1 to 5 in the total amount of the hair dye. Applying hair to human hair;
(B) a step of dyeing hair to which the photosensitive hair dye is applied by leaving it under a light source;
(C) rinsing the dyed hair with water and / or washing with shampoo;
(D) One or two or more cationic interfaces selected from the group consisting of a basic dye and / or HC dye, an alkylamine compound, a quaternized ammonium compound, and an amidoamine compound. Applying a hair treatment and hair coloring composition comprising an active agent and an oxyacid, and (e) rinsing the treated hair with water and / or washing and drying with shampoo,
The method for dyeing human hair according to claim 1, comprising   The photosensitive hair dye further comprises diethylenetriaminepentaacetic acid, hydroxyethanediphosphonic acid, edetic acid, (2S, 2'S) -2,2 '-(ethylenebisimino) bissuccinic acid, 1,3-diamino-2- One or more selected from the group consisting of propanol-N, N, N ′, N′-tetraacetic acid, N, N-di (2-hydroxyethyl) glycine, and nitrilotris (methylenephosphonic acid) The method for dyeing human hair according to claim 1 or 2, wherein the chelating agent is contained in an amount of 0.01 to 5% by mass based on the total amount of the hair dye. The method of repairing the color tone of the hair which a trouble generate | occur | produced using the dyeing method of the human hair of any one of Claims 1-3 .