KR20130075680A - Hair dye - Google Patents

Abstract

PURPOSE: A hyperchromatism of the hair by the specific dye as to the hair-dye, in which reducing agent and alkaline chemicals having thiol group are mixed is high. CONSTITUTION: Reducing agent and alkaline chemicals having the dye selected in hair-dye in the brazilin, haematoxylin, berberine, crocin, monascorubrin [monascorubrin], xanthan tomo naked body [xanthomonasin], carminic acid, curcumin and gardenia blue pigment more than one kind or 2 kinds, and the thiol group are mixed. It is mixed over one kind selected in the Curcumae longae Rhizoma pigment containing the Caesalpiniae Lignum pigment containing the brazilin in hair-dye, the logwood pigment containing haematoxylin, the phellodendron amureause ruprecht pigment containing berberine, the gardenia xanthophyll containing crocin, the anka pigment containing monascorubrin, the anka pigment containing xanthan tomo naked body, the cochineal colors containing carminic acid and curcumin than or 2 kinds. PH as to hair-dye, is over 8.0 11.0 or less. As the alkaline chemicals, the alkanolamine is mixed.

Description

Hair dye {HAIR DYE}

The present invention relates to hair dyes in which specific dyes are blended.

As one of the hair dyes used to color hair, an oxidative hair dye is known in which a first agent containing an oxidizing dye and a second agent containing hydrogen peroxide are mixed. Other hair dyes include turmeric, fire fighting, logwood, and yellow wall. It is known to mix | blend the pigment | dye derived from plants, such as and the like. The dye derived from the plant in the latter hair dye contains dye which becomes a dye, and the hair is colored by the dye. In addition, Patent Document 1 discloses a thing containing a natural plant salt component derived from a plant such as firefighting and yellow wall (claim 1), and Patent Document 2 discloses a hair dye incorporating dried rolls and soda sulfite. (Example 1 etc.).

Patent Document 1: Japanese Patent Application Laid-Open No. 2002-138024 Patent Document 2: Japanese Patent Laid-Open No. 2004-2475

Hair dyeing using the same dyes as those of plant-derived components as described above is also preferred to natural wave directors. In addition, it is often required to make the dyeing with the hair dye thicker.

In view of the above circumstances, an object of the present invention is to provide a hair dye having a high dye density with the same specific dyes as those contained in plants.

As a result of earnestly examining the hair dye which mix | blended the dye component which this inventor included in the plant, if it is the hair dye which the reducing agent which has a thiol group and alkali agent were mix | blended with a specific dye, it was found that high dyeing property was completed and completed this invention. It came to the following.

That is, the hair dye according to the present invention is one selected from brasins, hematoxylin, berberine, crosine, monascorubrin, xanthomonasin, carminic acid, curcumin, and gardenia blue cow. Or two or more dyes, a reducing agent having a thiol group, and an alkali agent. Examples of the hair dye include a joiner pigment containing brazil, a logwood pigment containing hematoxylin, a yellow wall pigment containing berberine, a gardenia yellow pigment containing crosine, a red yeast pigment containing monascorbulin, 1 type, or 2 or more types chosen from the red yeast pigment | dye containing santomonasine, the cochinyl pigment | dye containing carminic acid, and the turmeric pigment | dye containing curcumin may be mix | blended.

PH of the hair dye which concerns on this invention is 8.0 or more and 11.0 or less, for example.

It is suitable if alkanolamine is mix | blended as said alkali agent. As the alkanolamine, monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, monoisopropanolamine, 2-amino-2-methyl-1,3-propanediol, 2- Amino-2-methyl-1-propanol or 2-amino-2-hydroxymethyl-1,3-propanediol may be blended.

According to the hair dye which concerns on this invention which mix | blended the reducing agent and alkali agent which have a thiol group, the hair dye by the specific dye is highly concentrated.

Based on the hair dye which concerns on embodiment of this invention, this invention is demonstrated below.

The hair dye which concerns on this embodiment mix | blends a dye, a reducing agent, and an alkali agent with water (The compounding quantity of water is 70 mass% or more, for example). In addition, a well-known raw material for hair dye may further be mix | blended with the hair dye which concerns on this embodiment as an arbitrary raw material.

(dyes)

In the hair dye of the present embodiment, one or two or more selected from brasins, hematoxylins, berberines, crosins, monascorubins, xanthomonas, carminic acid, curcumin, and gardenia blue pigment are essential dyes. Compounded.

The essential dyes have the same structure as the plant-derived dyes, and the colors when the dyes are used are as follows. Brasilian is a pigment contained in the core of the stem of Caesalpinia sappan, and the color of the white yak hair treated with the hair dye which blended brasilian only as a dye is red. Hematoxylin is a pigment contained in the sap of logwood (Haematoxylum campechianum), and the color of the white yak hair treated with the hair dye which mixed only hematoxylin as a dye is purple. Berberine is a pigment | dye contained in what is obtained by extracting with water or ethanol from the bark of Phellodendron amurense, and the color of the white yak hair treated with the hair dye which mix | blended berberine as a dye is yellowish. Crosine is a pigment | dye contained in what is obtained by extracting with water or hydrous ethanol from the fruit of Gardenia jasminoides, and the color of the white yak hair treated with the hair dye which mix | blended crosine only as a dye is yellowish. Monascorbulin is a pigment contained in the extract obtained from red yeast mold (Monascus purpureus) with hydrous ethanol or hydrous propylene glycol, and the color of the white yak hair treated with a hair dye containing only Monascorubrine as a dye is , Red system. Xanthomonasine is contained in a pigment obtained by pulverizing a dry red yeast mold (Monascus purpureus) culture medium and extracting with neutral hydrochloric acid ethanol and neutralizing it, and treating it with a hair dye which contains only xanthomonas as a dye. The color of one white yak fur is yellowish. Carminic acid is a pigment contained in what is obtained by extracting with hydrous ethanol from the dry body of Coccus cacti, and the color of the white yak hair treated with the hair dye which mix | blended only carminic acid as a dye is purple. Curcumin is a pigment | dye contained in what is obtained by extracting with ethanol from the dried product of Curcuma longa root diameter, and the color of the white yak hair treated with the hair dye which mix | blended curcumin only as a dye is yellowish. Gardenia blue pigment is obtained by adding β-glucosidase to a mixture of iridoid glycosides and protein degradation products obtained by water extraction from the fruits of Gardenia jasminoides, and dyeing only gardenia blue pigment The color of the white yak hair treated with the hair dye blended as is blue.

Although the compounding quantity of the essential dye in the hair dye of this embodiment is not specifically limited, For example, they are 1 mass% or more and 10 mass% or less.

You may mix | blend the dye mix | blended with well-known hair dyes other than the said essential dye as a dye of the hair dye of this embodiment.

(reducing agent)

1 type (s) or 2 or more types chosen from the reducing agent which has a thiol group, are mix | blended with the hair dye of this embodiment as an essential reducing agent. Here, a "reducing agent" refers to a compound having a property capable of reducing and cleaving a disulfide bond of hair.

Examples of the reducing agent having a thiol group include salts of thioglycolic acid such as thioglycolic acid and sodium thioglycolate, salts of cysteine such as cysteine and cysteine hydrochloride, N-acetylcysteine such as N-acetylcysteine and N-acetylcysteine hydrochloride. And salts of cysteamine, thioglycerol, thio lactic acid, thio lactic acid salts, thiomalic acid and thiomalic acid.

Although the compounding quantity of the reducing agent which has a thiol group in the hair dye of this embodiment is not specifically limited, 0.1 mass% or more and 1.0 mass% or less are good. When it is out of this compounding quantity range, improvement of thick salt may be inadequate.

Well-known reducing agents other than the reducing agent which has the said thiol group may be used as a reducing agent mix | blended with the hair dye of this embodiment.

(Alkaline)

1 type (s) or 2 or more types chosen from the alkali chemicals are mix | blended with the hair dye of this embodiment. Here, an "alkali agent" means the raw material which makes pH alkaline when it is set as aqueous solution.

Examples of the alkali agent include ammonia and alkanolamines (monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, monoisopropanolamine, 2-amino-2-methyl-1,3- Propanediol, 2-amino-2-methyl-1-propanol, 2-amino-2-hydroxymethyl-1,3-propanediol, etc.), basic amino acids (such as arginine), carbonates (ammonium carbonate, ammonium bicarbonate, Sodium carbonate, sodium hydrogen carbonate, etc.), phosphate (sodium hydrogen phosphate, etc.), and sodium hydroxide. Suitable ones as alkali agents for increasing the thick salt are, for example, alkanolamines.

Although the compounding quantity of the alkali agent in the hair dye of this embodiment is not specifically limited, For example, it is an amount which makes pH of a hair dye to 8.0 or more and 11.0 or less.

(Arbitrary raw material)

The arbitrary raw materials mix | blended with the hair dye of this invention are suitably selected from well-known hair dye raw materials. Hair dye raw materials are anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, alcohols, polyhydric alcohols, sugars, ester oils, fats and oils, fatty acids, hydrocarbons, waxes, silicones, polymer compounds, amino acids, animal and plant extracts, microorganisms Derivatives, inorganic compounds, perfumes, preservatives, metal ion sequestrants, ultraviolet absorbers and the like.

Lower alcohols such as ethanol and isopropanol; Polyhydric alcohols such as propylene glycol, 1,3-butylene glycol, isopropylene glycol, glycerin; And aromatic alcohols such as benzyl alcohol and benzyloxyethanol are preferable for increasing the thick salt.

(Formulation)

The formulation at the time of use of a hair dye is not specifically limited, For example, a liquid form, a cream form, and a foam form (bubble form) are mentioned. When it is necessary to raise a viscosity in order to make a desired formulation, it is good to mix | blend a high molecular compound etc. like a well-known hair dye.

(pH)

PH of the hair dye of this embodiment is alkaline. The pH should just be 8.0 or more and 11.0 or less. In addition, what is necessary is just to mix | blend with the said alkali chemicals when pH adjustment is needed.

[Example]

Hereinafter, although this invention is demonstrated in detail based on an Example, unless this invention deviates from the meaning of this invention, this invention is not interpreted limitedly based on description of this Example.

The hair dye of the following Example and the comparative example was manufactured, and the hair-dyeing of the white hair | bristle bundle (yak hair | bristle bundle) was performed using this hair dye. The hair dyeing treatment was performed by applying a hair dye to the white hair and leaving it for about 30 minutes, followed by washing with a shampoo. And the color of the hair | bristle bundle after drying with warm air was confirmed visually.

(Examples 1a-1e, Comparative Examples 1a-1c)

Commercial product blended with brazilian derived from Caesalpinia sappan (`` Botanical color, red '' manufactured by Real Kagakusha), Display name of all compounded ingredients: Joiner, dextrin, carrageenan, brown sea extract, alginic acid Na, red soup extract, rosemary, camomile , Licorice) and hot water were mixed in the mass ratio of commercial item: hot water = 1: 10. The hair dyes of Examples 1a to 1e and Comparative Examples 1a to 1c having a pH of 9.0 to 10.0 were prepared by further adding a reducing agent and an alkali agent to the mixture so as to have the concentration shown in Table 1.

Table 1 shows the results of the "concentration evaluation" of hair dyeing using the hair dyes of Examples 1a to 1e and Comparative Examples 1a to 1c. "Concentration evaluation" was performed as follows based on the thing by comparative example 1a.

○○○: The stain was much darker than the standard.

○ ○: The dye was darker than the standard.

○: The stain was slightly darker than the standard.

―: Equivalent to criteria (Comparative Example 1a) or criteria.

X: Dyeing was lighter than a reference | standard.

In the thick salt evaluation of Table 1, Examples 1a to 1e in which a reducing agent having a thiol group and an alkali agent are blended, Comparative Example 1a in which the reducing agent and the alkali agent are not blended, Comparative Example 1b in which the reducing agent having a thiol group is not blended, and It can be confirmed that the thick salt evaluation was better than any of Comparative Examples 1c in which the alkali agent was not blended. In addition, the use of cysteamine as a reducing agent is advantageous to thick salt (compared with Example 1a and Examples 1d and 1e), and the use of alkanolamine as alkali agent is advantageous to thick salt (Examples 1a and 1b, and Contrast of Example 1c).

(Example 1f-1 to 1f-2, Example 1g-1 to 1g-2, Example 1h-1 to 1h-2)

Example 1f-1 to 1f-2 and Example 1g- having pHs of 9.0 to 10.0 by further adding a reducing agent and an alkali agent to the mixture of commercially available products and hot water mixed in the same manner as in Example 1a so as to have the concentrations shown in Table 2. Hair dyes of 1 to 1 g-2 and Examples 1 h-1 to 1 h-2 were prepared.

Table 1 shows the results of the "concentrated superiority" of hair dyeing using the hair dyes of Examples 1f-1 to 1f-2, Examples 1g-1 to 1g-2, and Examples 1h-1 to 1h-2. 2 is shown. "Concentrated superiority" refers to the contrast between Example 1f-1 and Example 1f-2, the contrast between Example 1g-1 and Example 1g-2, and the contrast between Example 1h-1 and Example 1h-2. As a result of the contrast, evaluation of the darker dyeing was made as "(circle)", and the case of lighter dyeing or both cases was made into "-".

Table 2 shows that increasing the compounding amount of the reducing agent does not necessarily act advantageously to thick salt.

(Examples 2a to 2e, Comparative Examples 2a to 2b)

A commercially available product mixed with hot water and containing hematoxylin derived from Haematoxylum campechianum (`` Botanical Color Logwood Color, '' manufactured by Real Kagakusha), Designation name of all ingredients: logwood, carrageenan, brown algae extract , Rosemary, chamomile, licorice) was used in the same manner as in Example 1a to prepare hair dyes of Examples 2a to 2e and Comparative Examples 2a to 2b, each having a pH of 9.0 to 10.0.

Table 3 shows the results of the "concentration evaluation" of hair dyeing using the hair dyes of Examples 2a to 2e and Comparative Examples 2a to 2b. "Concentration evaluation" was performed similarly to Example 1a based on the thing by Comparative Example 2a.

In the said Table 3, the thick salt evaluation similar to Table 1 is shown. That is, Examples 2a to 2e in which a reducing agent having a thiol group and an alkali agent are blended have a higher salt evaluation than any of Comparative Example 2a in which the reducing agent and the alkali agent are not mixed and Comparative Example 2b in which the reducing agent having a thiol group is not blended. It was good. In addition, the use of cysteamine as a reducing agent is advantageous to thick salt (compared with Example 2a and Examples 2d and 2e), and the use of alkanolamine as alkali agent is advantageous to thick salt (Examples 2a and 2b, and Contrast of Example 2c).

(Example 2f-1 to 2f-2, Example 2g-1 to 2g-2, Example 2h-1 to 2h-2)

Example 2f-1-2f-2 and Example 2g which pH is 9.0-10.0 by adding a reducing agent and an alkali chemicals further to the density | concentration shown in Table 4 to the mixture of the commercial item and hot water mixed similarly to Example 2a. -1-2g-2, and the hair dye of Examples 2h-1-2h-2 were prepared.

The results of the "concentration superiority" of the hair dye treatment using the hair dyes of Examples 2f-1 to 2f-2, Examples 2g-1 to 2g-2, and 2h-1 to 2h-2, are shown in the following table. 4 is shown. "Concentrated superiority" is a contrast between Example 2f-1 and Example 2f-2, contrast between Example 2g-1 and Example 2g-2, and contrast between Example 2h-1 and Example 2h-2. As a result of contrast, evaluation of the one dyed dark was made into "(circle)", and the case where the one lightly dyed or equivalent was made into "-".

Table 4 shows that, as in Table 2, increasing the blending amount of the reducing agent does not necessarily act advantageously to the thick salt.

(Examples 3a to 3e, Comparative Examples 3a to 3b)

Commercially available product mixed with berberine derived from Phellodendron amurense as a commercial product mixed with hot water (botanical color, yellow wall color manufactured by Real Kagakusha), the display name of all ingredients: yellow wall powder, sucrose, brown sea extract, carrageenan , Rosemary, chamomile, licorice) was used in the same manner as in Example 1a to prepare hair dyes of Examples 3a to 3e and Comparative Examples 3a to 3b having a pH of 9.0 to 10.0.

Table 5 shows the results of the "concentration evaluation" of hair dyeing using the hair dyes of Examples 3a to 3e and Comparative Examples 3a to 3b. "Concentration evaluation" was performed similarly to Example 1a based on the thing by Comparative Example 3a.

In the said Table 5, the thick salt evaluation similar to Table 1 is shown. That is, Examples 3a to 3e in which a reducing agent having a thiol group and an alkali agent are blended have a higher salt evaluation than any of Comparative Example 3a in which the reducing agent and the alkali agent are not blended and Comparative Example 3b in which the reducing agent having a thiol group is not blended. It was good. In addition, the use of cysteamine as a reducing agent is advantageous to thick salt (comparation between Example 3a and 3d and 3e), and the use of alkanolamine as alkali agent is advantageous to thick salt (Examples 3a and 3b, and practice). Contrast of Example 3c).

(Example 4)

The composition of pH 10 which mix | blended the alkali agent and the reducing agent (2 mass% 2-amino-2-methyl- 1-propanol, 1 mass% cysteamine, 8 mass% benzyl alcohol, 16 mass% of ethanol, These these, 10 mass parts of the composition which mix | blended all with water, and 1 mass part of the commercial item (crochet P-1900 by Gardenia yellow cow-containing product made from Daiwakasei Co., Ltd.) containing crosine was mixed, and the hair dye of Example 4 Was prepared.

(Comparative Example 4)

A hair dye of Comparative Example 4 was prepared in the same manner as in Example 4, except that the composition at pH 10 in Example 4 was changed to water.

When the hair dye treated with the hair dye of Example 4 and the hair dye of the hair bundle treated with the hair dye of Comparative Example 4 were compared, the hair bundle treated with the hair dye of Example 4 was deeply dyed.

(Example 5)

The same procedure as in Example 4 was repeated except that "commercial product containing crosine" in Example 4 was changed to "commercial product containing gardenia blue pigment (" High Blue GP-4A "manufactured by Daiwa Kasei Co., Ltd.)). Thus, the hair dye of Example 5 was prepared.

(Comparative Example 5)

A hair dye of Comparative Example 5 was prepared in the same manner as in Example 5, except that the composition at pH 10 in Example 5 was changed to water.

When the hair dye treated with the hair dye of Example 5 and the hair dye of the hair bundle treated with the hair dye of Comparative Example 5 were compared, the hair bundle treated with the hair dye of Example 5 was deeply dyed.

(Example 6)

Except having changed "the commercial item containing crosine" in Example 4 into "a commercial item containing Monascolubricin (Red yeast pigment-containing product" Daiwa Monas PH-3000 "made by Daiwa Kasei Co., Ltd.)" In the same manner as in 4, the hair dye of Example 6 was prepared.

(Comparative Example 6)

The hair dye of Comparative Example 6 was prepared in the same manner as in Example 6 except that the composition at pH 10 in Example 6 was changed to water.

When the hair dye treated with the hair dye of Example 6 and the hair dye of the hair bundle treated with the hair dye of Comparative Example 6 were compared, the hair bundle treated with the hair dye of Example 6 was deeply dyed.

(Example 7)

Except for changing the "commercial product containing crosine" in Example 4 to "commercial product containing xanthomonasin (Red yeast pigment-containing product" Dawamonas yellow TK "by Daiwa Kasei Co., Ltd.") In the same manner, the hair dye of Example 7 was prepared.

(Comparative Example 7)

A hair dye of Comparative Example 7 was prepared in the same manner as in Example 7, except that the composition at pH 10 in Example 7 was changed to water.

When the hair dye treated with the hair dye of Example 7 and the hair dye of the hair bundle treated with the hair dye of Comparative Example 7 were compared, the hair bundle treated with the hair dye of Example 7 was deeply dyed.

(Example 8)

Except having changed "the commercial item containing crosine" in Example 4 to "a commercial item containing carmic acid (Cochinyl red P-900" made by Daiwakasei Co., Ltd. In the same manner as in 4, the hair dye of Example 8 was prepared.

(Comparative Example 8)

The hair dye of Comparative Example 8 was prepared in the same manner as in Example 8 except that the composition at pH 10 in Example 8 was changed to water.

When the hair dye treated with the hair dye of Example 8 and the hair dye of the hair bundle treated with the hair dye of Comparative Example 8 were compared, the hair bundle treated with the hair dye of Example 8 was deeply dyed.

(Example 9)

It carried out similarly to Example 4 except having changed "the commercial item containing crosine" in Example 4 into "a commercial item containing curcumin (the turmeric pigment" Curcumin genuine product "made by Daiwakasei Co., Ltd.)". 9 hair dye was prepared.

(Comparative Example 9)

The hair dye of Comparative Example 9 was prepared in the same manner as in Example 9 except that the composition of pH 10 in Example 9 was changed to water.

When the hair dye treated with the hair dye of Example 9 and the hair dye of the hair bundle treated with the hair dye of Comparative Example 9 were compared, the hair bundle treated with the hair dye of Example 9 was deeply dyed.

(Examples 10 to 16)

The composition of pH 10 which mix | blended the alkali agent and the reducing agent (2 mass% 2-amino-2-methyl- 1-propanol, 0.5 mass% cysteamine, 8 mass% benzyl alcohol, 16 mass% of ethanol, These these, 10 mass parts of the composition which mix | blended all with water, and 1 mass part of commercial items containing a dye were mixed, and the hair dye of Examples 10-16 was manufactured. In Example 10, the commercial item containing the dye used here is 2 mass parts of Daiwa Kasei Co., Ltd. "Daiwa Monas PH-3000", 2 mass parts of Daiwa Kasei Co., Ltd. "Crosine P-1900", and real It is set as the mixture of 1 mass part of "Botanical color logwood color" by Kagakusha, and it was set as "Botanical color logwood color" by Real Kagakusha in Example 11, In Example 12, Daiwa Kasei Co., Ltd. Manufacturing Example "High Blue GP-4A", in Example 13, Daiwa Kasei Co., Ltd. "Crosine P-1900"; In Example 14, Daiwa Kasei Co., Ltd. "Daiwa Monas PH-3000" 1 mass part and "Crossin P-1900" by Daiwa Kasei Co., Ltd. make a mixture of 1 mass part, and in Example 15, "Botanical color red" by Real Kagakusha To and embodiment 16, it was prepared as a mixture of real-Kagaku Sha "Botanical color, red color", 1 part by mass, and real-Kagaku Sha manufacture "Botanical color, logwood color" 1 parts by mass.

The hair | bristle bundle which was dyed with the hair dye of the said Example 10 was dyed by the color of a multicolor system. In addition, the hair | bristle bundle processed by the hair dye of Examples 11-16 is the color of a purple system in Example 11, the color of a blue system in Example 12, and the yellow system in Example 13 In the case of Example 14, it was dyed orange, the color of the red system of Example 15, and the color of the purple system of Example 16, respectively.

(Comparative Examples 10a to 10h)

As a commercial item to be mixed with hot water, a commercial product (incorporated by Real Kagakusha, `` botanical color, indigo blue '', the display name of all compounding ingredients: side, carrageenan, cellulose, brown sea extract, patient-free extract, rosemary, chamomile, licorice) A hair dye of Comparative Examples 10a to 10h having a pH of 9.0 to 10.0 was prepared in the same manner as in Example 1a, except for using.

Table 6 shows the results of the "concentration evaluation" of the hair dye treatment using the hair dye of Comparative Examples 10a to 10h. "Concentration evaluation" was performed similarly to Example 1a on the basis of the comparative example 10f.

In said Table 6, the concentrated salt evaluation of the tendency different from Table 1 is shown. In other words, even when the reducing agent was blended, the dyeability was deteriorated (compared to Comparative Example 10f and Comparative Example 10h), and even when both the reducing agent and the alkali agent were combined, the dyeability was deteriorated (compared to Comparative Examples 10f and Comparative Examples 10a to 10e. ). In addition, although only the hair | bristle bundle of the comparative example 10f was dyed by the blue color, it was not dyed about the other hair | bristle bundle.

(Comparative Example 11a)

The hair dye of Comparative Example 11a was produced in the same manner as in Example 4 except that the "commercial product containing crosine" in Example 4 was changed to "a red pigment dye-containing commercial product containing cyanidin acyl glycoside".

(Comparative Example 11b)

A hair dye of Comparative Example 11b was prepared in the same manner as Comparative Example 11a, except that the composition at pH 10 in Comparative Example 11a was changed to water.

As a result of confirming the thickening property of the hair | bristle bundle treated with the hair dye of the comparative example 11a and the hair | bristle bundle treated with the hair dye of the comparative example 11b, dyeing of the hair | bristle bundle could not be confirmed for both.

(Comparative Example 12a)

The hair dye of Comparative Example 12a was prepared in the same manner as in Example 4 except that the "commercial product containing crosine" in Example 4 was changed to "a blush pigment-containing commercial product containing pelargonidine acyl glycoside". .

(Comparative Example 12b)

A hair dye of Comparative Example 12b was prepared in the same manner as Comparative Example 12a, except that the composition at pH 10 in Comparative Example 12a was changed to water.

As a result of confirming the thickening property of the hair | bristle bundle treated with the hair dye of the comparative example 12a and the hair | bristle bundle treated with the hair dye of the comparative example 12b, dyeing of the hair | bristle bundle was not confirmed together.

Claims (5)

It has one or two or more dyes, thiol groups selected from brasins, hematoxylin, berberine, crosine, monascorubrin, xanthomonasin, carminic acid, curcumin and gardenia blue pigment A hair dye comprising a reducing agent and an alkali agent. 2. The red pigment of brachilin, the logwood pigment of hematoxylin, the yellow wall pigment of berberine, the gardenia yellow pigment of crosine, and the red yeast pigment of monas corubrin. A dyeing agent comprising one or two or more selected from a red yeast dye containing xanthomonasine, a cochinyl dye containing carminic acid and a turmeric dye containing curcumin. The hair dye according to claim 1 or 2, wherein the pH is 8.0 or more and 11.0 or less. The hair dye according to claim 1 or 2, wherein an alkanolamine is blended as the alkali agent. The method of claim 4, wherein as the alkanolamine, monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, monoisopropanolamine, 2-amino-2-methyl-1,3 -Hair dye in combination with propanediol, 2-amino-2-methyl-1-propanol or 2-amino-2-hydroxymethyl-1,3-propanediol.