JP2002241248A - Hair dyeing method, oxidizing hairdye composition and hair-dyeing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair dyeing method, an oxidizing hairdye composition and hair-dyeing tools giving uniform color value in a bleached state between a dyed hair and a newly grown hair without damaging the hair. SOLUTION: In the case of the redyeing of hair after a definite period from the last dyeing treatment, the newly grown hair is coated with an alkaline oxidizing hairdye composition having a hydrogen peroxide concentration of 2-4 wt.% and an application pH of 9.5-11 and the previously dyed hair is coated with a slightly alkaline oxidizing hairdye composition having a hydrogen peroxide concentration of 0.5-1.5 wt.% and an application pH of 7.5-9.4. The applied oxidizing hairdye compositions are washed off after the lapse of a definite period at room temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dyeing method using an oxidative hair dye, and more particularly, to the brightness of hair after dyeing without causing unnecessary damage to already dyed hair. The present invention relates to a hair dyeing method for preventing a difference in lightness between a root and a hair tip after color fading and color fading.

[0002]

2. Description of the Related Art Conventionally, when dyeing hair, an oxidative hair dye has been generally used. As the oxidative hair dye, there is widely used a two-part type consisting of a first agent containing an oxidative dye intermediate and an alkaline agent and a second agent containing an oxidant, and mixing them at the time of use. Have been.

[0003] This oxidative hair dye allows a colorless and low molecular weight oxidative dye intermediate to penetrate into the hair, and oxidatively polymerizes the oxidative dye intermediate by the action of an oxidizing agent to form a pigment, which is then dyed in the hair. By applying the hair, the hair is dyed, and the hair can be dyed in various colors as required.

[0004]

However, in the above-described hair dyeing method, when the hair dyeing treatment is performed once using an oxidative hair dye, and after a certain period of time, the hair dyeing treatment is performed again. Means that the part that has been subjected to the previous hair dyeing treatment (the already-dyed hair) and the hair that has newly grown after the previous hair dyeing treatment (the new hair) have undergone dye discoloration (due to the effects of washing, ultraviolet rays, heat, etc.) (When the color has fallen), there is a problem that the brightness of the hair color is different.

That is, the already dyed hair is subjected to a hair dyeing treatment twice or more, and is strongly decolorized by the action of the alkali agent and the oxidizing agent contained in the oxidized hair dye (the melanin pigment in the hair is decomposed, While the blackness of the hair is lost and the hair becomes lighter than the original hair color), the new hair is subjected to a hair dyeing treatment only once and the degree of bleaching is small, so that the already dyed hair and the new hair Differs in the way hair decolorization proceeds.

[0006] Immediately after hair dyeing, the difference in the degree of bleaching progresses due to the coloring of the dye, so that the difference in lightness of the hair is not conspicuous. In addition, a lightness difference due to a difference in the degree of progress of decolorization appears.
Further, in the case of a hair dyeing method using an alkaline oxidative hair dye, the hair is inevitably damaged to some extent, and it is not always preferable to repeatedly perform the hair dyeing treatment on the same hair.

The present invention has been made in view of the above points, and there is provided a hair dyeing method which does not cause a difference in lightness between a dyed hair and a new hair at the time of fading and has little damage to the hair. hair composition, and to provide a hair coloring article of interest.

[0008]

Means for Solving the Problems and Effects of the Invention (1) The invention of claim 1 is a hair dyeing method using an oxidized hair dye composition containing a dye, an alkali agent, and an oxidizing agent, An alkaline oxidative hair dye composition having a pH of 9.5 to 11.0 at the time of use is applied to newborn hair, and a pH of 7.5 to 9.5. The gist of the present invention is a hair dyeing method characterized by applying the slightly alkaline oxidative hair dye composition of No. 4.

In the hair dyeing method of the present invention, the hair is dyed by, for example, applying an oxidized hair dye composition to the hair. By properly using the hair according to the condition of the hair, it is possible to prevent the brightness of the hair after dyeing from being different depending on the location and to prevent damage to the already dyed hair.

For example, in the case where hair is dyed once and then is dyed again after a certain period of time, the hair has already been dyed previously (the already dyed hair) and the hair has newly grown after the previous hair dyeing. Hair (new hair) is present, and the already dyed hair has been bleached to some extent by the previous hair dyeing treatment. In this state, when all the hairs are dyed with the same alkaline oxidative hair dye composition, the degree of bleaching differs between the already dyed hair and the new hair, resulting in a difference in the brightness of the hair. In particular, when the hair fades, the difference in brightness due to the difference in the degree of progress of bleaching becomes more noticeable.

Therefore, in the present invention, for pre-dyed hair, the use of a slightly alkaline oxidative hair dye composition having a pH of 7.5 to 9.4 during use reduces the progress of bleaching, For new hair that has not yet been bleached, the degree of bleaching is larger than that of the already-dyed hair by using an alkaline oxidative hair dye composition having a pH of 9.5 to 11.0 during use. By doing so, the degree of progress of bleaching between the already dyed hair portion and the new hair portion after hair dyeing is made uniform, so that there is no difference in the brightness of the hair color when fading.

In the hair dyeing method of the present invention, the new hair is PH
11 or less alkaline oxidative hair dye composition, the dyed hair is P
Since the hair is dyed with a slightly alkaline oxidative hair dye composition of H9.4 or less, damage to the dyed hair is minimized, and the hair after dyeing keeps moisture and a smooth feel. I have.

Furthermore, in the hair dyeing method of the present invention, the pH of both the alkaline oxidative hair dye composition and the slightly alkaline oxidative hair dye composition is 7.5 or more.
Dyes in vivid colors. Incidentally, the decolorization, for example, by the action of the alkali agent and the oxidizing agent contained in the oxidative hair dye composition,
It means that the melanin pigment in the hair is decomposed and the color of the hair becomes brighter. The higher the pH of the oxidative hair dye composition, the easier the bleaching proceeds.

[0014] The term "in use" refers to the time when the oxidized hair dye composition is applied to the hair or when the oxidized hair dye composition is ready to be applied. In the case of an oxidative hair dye composition of a type that is applied to hair from
It means when two agents are mixed. As a method of separately applying two kinds of oxidative hair dye compositions to the already-dyed hair and the new hair, for example, as shown in FIG. 1, the tip of the hair is dyed while the hair is stretched. There is a method in which a slightly alkaline oxidative hair dye composition is applied to a portion (dyed hair) and an alkaline oxidative hair dye composition is applied to an unstained portion (new hair) at the root of hair. .

The dye includes, for example, an oxidation dye intermediate and a coupler, and the oxidation dye intermediate and the coupler penetrate into hair and polymerize by the action of an oxidizing agent to form a dye. There is. Other dyes include, for example, direct dyes.

The oxidation dye intermediate includes, for example, one or a mixture of two or more of phenylenediamines, aminophenols, diaminopyridines and salts thereof. Among them, p-phenylenediamine, toluene-2,5-diamine, N, N-bis (2-
(Hydroxyethyl) -p-phenylenediamine, 2-
(2′-hydroxyethyl) -p-phenylenediamine, N-phenyl-p-phenylenediamine, 4,4 ′
-Diaminodiphenylamine, 2-chloro-p-phenylenediamine, N, N-dimethyl-p-phenylenediamine, p-aminophenol, o-aminophenol,
p-methylaminophenol, 2,6-dichloro-p-
Phenylenediamine, p-aminophenylsulfamic acid, 2,5-diaminopyridine and salts thereof are preferred from the viewpoint of hair dyeing power.

As the coupler, for example, resorcinol,
Pyrogallol, m- aminophenol, m- phenylenediamine, o- aminophenol, 2,4-di-aminophenol, 1,2,4 pen Regent triol, toluene -
3,4-diamine, toluene-2,4-diamine, hydroquinone, α-naphthol, 2,6-diaminopyridine, 3,3′-iminodiphenol, 1,5-dihydroxynaphthalene, 5-amino-o-cresol , Diphenylamine, p-methylaminophenol, phloroglucin, 2,4-diaminophenoxyethanol, gallic acid, tannic acid, ethyl gallate, methyl gallate, propyl gallate, quintet, 1-methoxy-2-amino-
4- (2-hydroxyethyl) aminobenzene, 5-
There are (2-hydroxyethylamino) -2-methylphenol and salts thereof.

Direct dyes are dyes whose basic molecular structure does not change when an oxidative hair dye is used, for example, known dyes such as tar dyes and natural dyes can be used. Species or two or more species may be used in combination. Among them,
Nitro dyes, azo dyes, nitroso dyes, or indigo dyes are preferred because good hair dyeing effects can be obtained.

Specific examples of the direct dye include, for example, nitro-p-phenylenediamine, p-nitro-o-phenylenediamine, p-nitro-m-phenylenediamine,
2-amino-4-nitrophenol, 2-amino-5
Nitrophenol, picramic acid, their salts, and
Among the dyes (hereinafter referred to as legal dyes) specified by the “Ministerial Ordinance for Specifying Tar Dyes that can be Used in Pharmaceuticals, etc.” , Also the legal dye, Red No. 2,
Red 102, Red 201, Red 225, Red 22
7, Red 501, Red 502, Red 503, Red 504, Red 505, Red 506, Orange 205, Orange 402, Orange 403,
Yellow 4, Yellow 5, Yellow 402, Yellow 404, Yellow 405, Yellow 406, Yellow 407, Brown 20
No. 1, azo dyes such as black No. 401, nitroso dyes such as green No. 401, also blue No. 1, blue No. 202, blue No. 203, blue No. 205, green No. 3, green No. 205,
Triphenylmethane dyes such as Green No. 402, Red No. 3, Red No. 104 (1), Red No. 105 (1), Red No. 106, Red No. 218, Red No. 230 (1), Red No. 230 No. (2), Red No. 231, Red 2
Xanthene dyes such as No. 32, Red No. 401, Orange No. 201, Orange No. 207, Yellow No. 201, Yellow No. 202 (1), Yellow No. 202 (2), etc. Similarly, Yellow No. 203 and Yellow No. 204 Quinoline dyes such as 1-amino-4-methylaminoanthraquinone, 1,4-diaminoanthraquinone, legal dyes blue 403, green 201,
Anthraquinone dyes such as Green No. 202, Purple No. 201 and Purple No. 401, and indigo dyes such as Blue No. 2 and Blue No. 201 are also available.

The ratio of the weight of the dye to the whole is, for example, from 0.005 to 15% by weight, preferably from 0.1 to 15% by weight.
05 to 10% by weight. When the dye contains, for example, an oxidation dye intermediate, the coupler is contained, for example, in an amount of 0.005 to 10% by weight, preferably 0.05 to 5% by weight based on the whole.

The alkaline agent acts to make the oxidative hair dye composition alkaline, for example. And pH at the time of using an oxidative hair dye composition can be adjusted with a buffer, for example. As the alkaline agent, for example,
Monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine and 2
-Alkanolamines such as -amino-2-methylpropanol, ammonia, sodium hydroxide, potassium hydroxide and the like can be added as necessary.

Examples of the buffer include ammonium chloride, ammonium carbonate, sodium carbonate, ammonium hydrocarbonate, sodium hydrogencarbonate, ammonium phosphate,
There are ammonium nitrate, ammonium sulfate and sodium sulfate. -Examples of the oxidizing agent include hydrogen peroxide and urea peroxide, and hydrogen peroxide is particularly preferable.

The oxidative hair dye composition used in the present invention may further contain other optional components used in cosmetics as long as the effects of the present invention are not impaired. Other optional components include, for example, viscosity / gel strength modifiers (eg, natural or synthetic polymers such as gum arabic, locust bean gum, sodium alginate, xanthan gum, cellulose derivatives, cross-linked polyacrylic acid, fatty acids),
Fats (eg, avocado oil, jojoba oil, macadamian nut oil, glyceride of olive oil), hydrocarbons (eg, waxes such as beeswax and lanolin, liquid paraffin, solid paraffin, isoparaffin, squalane), polyhydric alcohols (Eg, propylene glycol, glycerin, diglycerin, 1,3-butylene glycol, polyglycerin, sorbitol), esters (eg, isopropyl myristate, octyldodecyl myristate), amides (eg, diethanolamide oleate, laurin) Acid diethanolamide), silicone derivatives (eg, dimethylpolysiloxane, methylphenylpolysiloxane, polyether-modified silicone, amino-modified silicone), cationic surfactants (eg, stearyl chloride) Trimethylammonium, distearyldimethylammonium chloride), anionic surfactants (eg, polyoxyethylene lauryl ether sulfate, polyoxyethylene lauryl sulfosuccinate), amphoteric surfactants (eg, laurylhydroxysulfobetaine, lauryldimethylcarbobetaine) ), Nonionic surfactants (eg, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether), nonionic polymers (eg, polyvinylpyrrolidone, copolymers of vinylpyrrolidone and vinyl acetate), anionic Polymers (for example, copolymers of acrylic acid and / or methacrylic acid and alkyl (meth) acrylate), amphoteric polymers (for example, N-methacryloylethyl-N, N-dimethylammonium) Beam -α-
A copolymer of N-methylcarboxybetaine and butyl methacrylate), a higher alcohol (e.g., lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, Hydrolysates obtained by hydrolyzing proteins such as 2-octyldodecanol, 2-decyltetradecanol), collagen, keratin, elastin, fibroin, conchiolin, soybean protein, casein, gelatin, and the like with acids, alkalis, enzymes, and the like; A quaternary polypeptide such as a cation-denatured protein, a humectant (eg, sodium pyrrolidonecarboxylate, sodium lactate, sorbitol, hyaluronic acid);
Preservatives such as paraben, chelating agents (e.g., edetate, sodium polyphosphate, sodium citrate), stabilizers (e.g., phenacetin, 8-oxyquinoline), antioxidants (e.g., thioglycolic acid, sulfites , Ascorbic acid), plant extracts, crude drug extracts, vitamins, pigments, fragrances, pigments, ultraviolet absorbers and the like.

The oxidative hair dye composition used in the present invention can be in the form of, for example, a liquid, an emulsion, a cream, a gel, or a paste. (2) The invention of claim 2 is that the alkaline oxidative hair dye composition contains hydrogen peroxide as an oxidizing agent, and the slightly alkaline hair dye composition contains hydrogen peroxide as an oxidizing agent,
The concentration of hydrogen peroxide in the alkaline oxidative hair dye composition during use is 2.0 to 4.0% by weight, and the concentration of hydrogen peroxide in the slightly alkaline hair dye composition during use is 0.1% by weight. The hair dyeing method according to claim 1, wherein the amount is 5 to 1.5% by weight.

The present invention illustrates the oxidizing agent and the concentration of hydrogen peroxide in the oxidative hair dye composition during use.
In the hair dyeing method of the present invention, by setting the concentration of hydrogen peroxide in the alkaline oxidative hair dye composition and the concentration of hydrogen peroxide in the slightly alkaline oxidative hair dye composition within the above ranges, respectively, the dyeing after the hair dyeing is completed. The difference in brightness between the hair and the new hair can be further reduced.

Further, when the concentration of hydrogen peroxide in the alkaline oxidative hair dye composition at the time of use is 2.0% by weight or more, the hair can be dyed in a vivid color,
When the content is 4.0% by weight or less, the hair is not damaged, and the bleaching of the hair does not excessively proceed.

Further, when the concentration of hydrogen peroxide in the slightly alkaline oxidative hair dye composition at the time of use is 0.5% by weight or more, the hair can be dyed in a vivid color. When the content is 5% by weight or less, the hair is not damaged and the progress of bleaching of the hair can be suppressed. (3) The invention according to claim 3 is the invention wherein the hue difference between a white hair bundle dyed using the alkaline oxidative hair dye composition and a white hair bundle dyed using the slightly alkaline oxidative hair dye composition is as follows: H
The gist is the hair dyeing method according to claim 1 or 2, wherein the value is smaller than 10.

The alkaline oxidative hair dye composition and the slightly alkaline oxidative hair dye composition used in the hair dyeing method of the present invention each have a hue difference of 10 or less for the white hair bundle dyed using each. The color difference of the hair dyed using is small. Therefore, in the hair dyeing method of the present invention, the new hair part dyed with the alkaline oxidative hair dye composition and the already dyed hair part dyed with the slightly alkaline oxidative hair dye composition have similar hues. And no unevenness in color tone.

Further, in the hair dyeing method of the present invention, there is no difference in brightness between the new hair part and the already-dyed hair part. A uniform state is obtained on both sides of the hue. -The white hair bundle dyed using the alkaline oxidative hair dye composition is, for example, a hair bundle obtained by subjecting white human hair or goat hair to hair dyeing using an alkaline oxidative hair dye.

The white hair bundle dyed using the above-mentioned slightly alkaline oxidative hair dye composition is, for example, white human hair or goat hair which has been subjected to hair dyeing using an alkaline oxidative hair dye. A bunch. The hue difference is, for example, a hue difference in the L ^* a ^* b ^* color system and can be expressed as shown in FIG. The hue difference of the dyed hair bundle can be measured using, for example, a spectrophotometer.

(4) A fourth aspect of the present invention is a method for preparing a white hair bundle dyed using the alkaline oxidative hair dye composition and a white hair bundle dyed using the slightly alkaline oxidative hair dye composition. The gist of the hair dyeing method according to any one of claims 1 to 3, wherein the chromaticity differences Δa and Δb are both smaller than 10.

The two oxidized hair dye compositions (alkaline oxidized hair dye composition and slightly alkaline oxidized hair dye composition) used in the present invention have the chromaticity of a white hair bundle dyed using each. Since both the differences Δa and Δb are 10 or less, the chromaticity differences Δa and Δb of the hair dyed using each of them are small.

Therefore, in the hair dyeing method of the present invention, the new hair portion dyed with the alkaline oxidative hair dye composition and the already dyed hair portion dyed with the slightly alkaline oxidative hair dye composition are:
It has similar chromaticity and does not have uneven color tone. Further, in the hair dyeing method of the present invention, since there is no difference in brightness between the new hair part and the dyed hair part, after all, the new hair part and the dyed hair part are
A uniform state is obtained in both the brightness and the chromaticity.

The chromaticity difference is, for example, a chromaticity difference in the L ^* a ^* b ^* color system. As shown in FIG. 3, .DELTA.a is the chromaticity difference in the green-red direction.色 b represents the chromaticity difference,
It represents the chromaticity difference in the yellow-blue direction among the chromaticities. The chromaticity difference between the dyed hair bundles can be measured using, for example, a spectrophotometer.

(5) The invention of claim 5 is characterized in that the white hair bundle dyed using the alkaline oxidative hair dye composition and the white hair bundle dyed using the slightly alkaline oxidative hair dye composition The gist of the hair dyeing method according to any one of claims 1 to 4, wherein the color difference ΔE is smaller than 15.

The two oxidized hair dye compositions (alkaline oxidized hair dye composition and slightly alkaline oxidized hair dye composition) used in the present invention have a color difference ΔE of a white hair bundle dyed using each of them. Is 15 or less, the color difference ΔE of the hair dyed using each is small. Therefore, in the hair dyeing method of the present invention, the color difference between the new hair part dyed with the alkaline oxidative hair dye composition and the already dyed hair part dyed with the slightly alkaline oxidative hair dye composition is small. And no unevenness in color tone.

The color difference is a color difference in the L ^* a ^* b ^* color system, and is expressed as a combination of a hue difference and a brightness difference as shown in FIG. In addition, the color difference of the dyed hair bundle is
For example, it can be measured using a spectrophotometer. (6) The invention according to claim 6 is the lightness difference between a white hair bundle dyed using the alkaline oxidative hair dye composition and a white hair bundle dyed using the slightly alkaline oxidative hair dye composition. L
The gist is the hair dyeing method according to any one of claims 1 to 5, wherein the method is in the range of 3 to 13.

In the present invention, the use of a combination of oxidized hair dye compositions having a lightness difference of 3 to 13 expressed by ΔL when a white hair bundle is dyed allows hair after dyeing. , The difference in lightness between the already dyed hair part and the new hair part can be eliminated. In other words, the already dyed hair is in a state in which the hair coat is opened by the hair dyeing treatment, so that it is easier to receive the dye than the new hair. For example, the oxidized hair having a lightness difference of less than 3 expressed by ΔL When a combination of agent compositions is used,
In some cases, the already dyed hair receives more dye than the new hair and is dyed darker (the L value indicating lightness becomes smaller).

Therefore, in the present invention, for example, the L value of the slightly alkaline oxidative hair dye composition used for the already dyed hair part (the L value when the white hair bundle is dyed) is used for the new hair part. By making the L value of the alkaline oxidative hair dye composition higher by 3 to 13 (lightening the color), the already dyed hair portion after performing the hair dyeing,
The same color density as the new hair portion can be obtained (the L value indicating the brightness becomes equal).

The combination of the slightly alkaline oxidative hair dye composition and the alkaline oxidative hair dye composition used in the present invention has a lightness difference of 3 or more when a white hair bundle is dyed using each of them. Is sufficient to equalize the difference in color depth (△ L) between the dyed hair and the new hair after dyeing, and the lightness difference when dyeing a white hair bundle is 13 or less Therefore, the adjustment of the color density difference (△ L) does not go too far, and the dyed hair does not become brighter.

The lightness difference ΔL is a lightness difference in the L ^* a ^* b ^* color system, and is a parameter that satisfies the following relational expression between the above ΔE, Δa, and Δb. . ΔE = [(ΔL) ² + (Δa) ² + (Δb) ² ] ^{1/2 The} lightness difference ΔL can be measured using, for example, a spectrophotometer.

The lightness difference ΔL when a white hair bundle is dyed using each of the slightly alkaline oxidative hair dye composition and the alkaline oxidative hair dye composition is, for example, the respective oxidative hair dye composition Can be provided by providing a difference in the brightness of the dye contained in the dye. (7) The invention of claim 7 is a slightly alkaline oxidative hair dye composition used for already dyed hair in the hair dyeing method according to claim 1, wherein the dye, an alkali agent, An oxidizing hair dye composition comprising an oxidizing agent and having a pH of 7.5 to 9.4 when used.

By using the oxidative hair dye composition of the present invention to carry out, for example, the hair dyeing method of the first aspect, the same effect as that of the hair dyeing method of the first aspect can be obtained. (8) The invention of claim 8 is characterized in that the oxidizing agent contains hydrogen peroxide, and the hydrogen peroxide concentration during use is 0.5 to 1.5% by weight. SUMMARY OF THE INVENTION

The oxidative hair dye composition of the present invention can dye hair in a vivid color by having a hydrogen peroxide concentration of 0.5% by weight or more at the time of use. % Or less, the hair is not damaged, and the progress of bleaching of the hair can be suppressed.

(9) The ninth aspect of the present invention is directed to the hair dyeing method according to the first aspect, wherein the alkaline oxidative hair dye composition used for new hair and the already used hair are used. A hair dyeing product comprising a slightly alkaline oxidized hair dye composition, wherein the alkaline oxidized hair dye composition and the slightly alkaline oxidized hair dye composition are respectively a dye, an alkali agent, An oxidizing agent, wherein the pH of the alkaline oxidative hair dye composition when used is 9.5 to 11.0, and the PH when the slightly alkaline oxidative hair dye composition is used is 7.5.
It is a gist of the hair dyeing article characterized by being ~ 9.4.

By using the hair dyeing article of the present invention, for example, by implementing the hair dyeing method according to the first aspect, the same effect as the hair dyeing method according to the first aspect can be obtained. (10) The invention according to claim 10, wherein the alkaline oxidative hair dye composition and the slightly alkaline oxidative hair dye composition each contain hydrogen peroxide, and the alkaline oxidative hair dye during use is used. The hydrogen peroxide concentration of the agent composition is 2.0
And the concentration of hydrogen peroxide in the slightly alkaline oxidative hair dye composition during use is 0.5 to 1.5% by weight.
The hair dye article according to claim 9, wherein the hair dye article is in weight%.

The hair dyeing article of the present invention is capable of coloring the hair into a vivid color when the concentration of hydrogen peroxide in the alkaline oxidative hair dye composition during use is 2.0% by weight or more. When the content is 4.0% by weight or less, the hair is not damaged, and the bleaching of the hair does not proceed excessively.

Further, when the concentration of hydrogen peroxide in the slightly alkaline oxidative hair dye composition at the time of use is 0.5% by weight or more, the hair can be dyed in a vivid color,
When the content is 1.5% by weight or less, the hair is not damaged and the progress of bleaching of the hair can be suppressed.

[0049]

Examples of embodiments of the hair method of the present invention DETAILED DESCRIPTION OF THE INVENTION below (Examples) will be described. B) First, oxidative hair dye compositions (compositions 1 to 12) used in Examples and Comparative Examples were produced.

Each of compositions 1 to 12 comprises a first agent containing an alkaline agent and a dye, and a second agent containing an oxidizing agent. When performing hair dyeing, the first agent and the second agent are used. Are mixed and used in equal amounts. Compositions 1 to 12, respectively, are shown in Tables 1 to
It was produced by mixing the components shown in Table 3 according to the corresponding component ratio.

Incidentally, the component ratio of ammonium chloride and 28% ammonia water is determined to be a predetermined PH (for example, when the first agent and the second agent are mixed in equal amounts) at the time of use (for example, the composition 1).
Is 9.95, and composition 2 is 8.37). Tables 1 to 3 also show the PH and hydrogen peroxide concentration (% by weight) of the compositions 1 to 12 during use.

The ratio of the components of the purified water of the first agent is 1 in total.
It is adjusted to be 00% by weight.

[0053]

[Table 1]

[0054]

[Table 2]

[0055]

[Table 3]

B) Next, a hair bundle of new hair to be dyed in Examples and Comparative Examples and a hair bundle of already dyed hair were prepared. The hair bundle of the new hair is an untreated black hair bundle, and the hair bundle of the dyed hair is a hair bundle that has been bleached in the following steps. The composition 1 is applied to a black hair bundle and dyed,
After leaving for a minute, rinse off.

The hair tresses thus dyed are immersed in a 1% by weight aqueous solution of sodium lauryl sulfate at 50 ° C. for 20 minutes. The above steps are repeated five times to fade the color, and to prepare a hair bundle of dyed hair. C) Next, the compositions 7 to 12 were compared in terms of color tone when a white hair bundle was dyed with each composition. As a comparison method, the color tone of the white hair bundle dyed with the compositions 8 to 12 was expressed as a difference from the color tone of the hair bundle dyed with the composition 7.

[0058] More specifically, it was carried out according to the procedure of - of the following. Compositions 7 to 12 were applied to white hair bundles (human hair or goat hair), respectively, and allowed to stand at 30 ° C for 20 minutes. After washing with water, finishing with normal shampoo and rinsing, it was dried.

Based on the white hair bundle dyed with the composition 7,
The hue difference ΔH, the chromaticity differences Δa and Δb, the color difference ΔE, and the lightness difference ΔL from the white hair bundle dyed with the compositions 8 to 12 were measured.
Note that ΔH, Δa and Δb, ΔE, and ΔL are all spectrophotometers CM-508d (standard light source D ₆₅₎ manufactured by Minolta.
L ^* a ^* b ^* color system (CIE1976)
Was measured.

Table 4 shows the white hair bundles dyed with the compositions 7 to 12 based on the white hair bundles dyed with the composition 7.
H, △ a and △ b, △ E and △ L.

[0061]

[Table 4]

D) Next, a description will be given of a hair dyeing test performed by applying an oxidative hair dye composition to each of new hair and already dyed hair. (Example 1) Composition 1 (PH 9.9)
5) is applied, and composition 2 (PH 8.3) is applied to the already dyed hair bundle.
7) was applied, left at room temperature for 20 minutes, and then washed away. (This is an example that satisfies the requirements of the invention described in Claim 1 or 2.) (Example 2) Composition 1 (PH 9.9)
5) is applied, and composition 3 (PH 8.3) is applied to the already dyed hair bundle.
7) was applied, left at room temperature for 20 minutes, and then washed away. (This is an example that satisfies the requirements of the invention described in Claim 1.) (Example 3) Composition 7 (PH10.
1) is applied, and the composition 8 (PH 8.1) is applied to the already dyed hair bundle.
7) was applied, left at room temperature for 20 minutes, and then washed away. (This is an example that satisfies the requirements of the inventions set forth in claims 1 to 6. (Example 4) Composition 7 (PH10.
1) is applied, and composition 9 (PH 8.2) is applied to the already dyed hair bundle.
8) was applied, left at room temperature for 20 minutes, and then washed away. (This is an example that satisfies the requirements of the invention described in claims 1 to 6.) (Example 5) Composition 7 (PH10.
1) is applied, and the composition 11 (PH8.
39) was applied, left at room temperature for 20 minutes, and then washed away. (Although the requirements of the inventions described in claims 1, 2 and 6 are satisfied, ΔH of the compositions 7 and 11 is out of the scope of the invention described in claim 3, and Δb is the invention described in claim 4. ) And ΔE is out of the scope of the invention described in claim 5.) (Example 6) Composition 7 (PH10.
1) was applied, the hair bundle Sundesomeke composition 12 (PH8.
28) was applied, left at room temperature for 20 minutes, and then washed away. (The requirements of the invention described in claim 1 or 2 are satisfied,
ΔH of compositions 7 and 12 is outside the scope of the invention described in claim 3, Δb is outside the scope of the invention described in claim 4,
ΔE is outside the scope of the invention described in claim 5, and ΔL is an example outside the scope of the invention described in claim 6. (Comparative Example 1) For both the hair bundle of new hair and the hair bundle of dyed hair,
Composition 1 (PH9.95) was applied to wash away after standing 20 minutes at room temperature. (This is an example in which the pH of the oxidative hair dye applied to the already-dyed hair is out of the scope of the invention described in claims 1 to 6.) (Comparative Example 2) The hair bundle of the new hair and the already-dyed hair For both hair bundles,
Composition 2 (PH 8.37) was applied and left at room temperature for 20 minutes before rinsing. (This is an example in which the pH of the oxidative hair dye applied to the new hair is out of the scope of the invention described in claims 1 to 6.) (Comparative Example 3) Composition 2 (PH8) .3
7) is applied, and composition 1 (PH 9.9) is applied to the already dyed hair bundle.
5) was applied, left at room temperature for 20 minutes, and then washed away. (PH of oxidative hair dye applied to new hair and already dyed hair
Is an example outside the scope of the invention described in claims 1 to 6. (Comparative Example 4) Composition 4 (PH11.
5) is applied, and composition 5 (PH11.
5) was applied, left at room temperature for 20 minutes, and then washed away. (PH of oxidative hair dye applied to new hair and already dyed hair
Is an example outside the scope of the invention described in claims 1 to 6. (Comparative Example 5) Composition 4 (PH11.
5) is applied, and composition 6 (PH 6.8) is applied to the already dyed hair bundle.
2) was applied, left at room temperature for 20 minutes, and then washed away. (PH oxidizing hair dye to be applied to the nascent hair and Sundesome hair
Is an example outside the scope of the invention described in claims 1 to 6. (Comparative Example 6) Composition 1 (PH 9.9)
5) is applied, and composition 6 (PH 6.8) is applied to the already dyed hair bundle.
2) was applied, left at room temperature for 20 minutes, and then washed away. (The pH of the oxidized hair dye applied to the already dyed hair is as defined in claim 1)
It is an example which is outside the scope of the invention described in Nos. 6 to 6. (Comparative Example 7) Composition 4 (PH11.
5) is applied, and composition 2 (PH 8.3) is applied to the already dyed hair bundle.
7) was applied to wash away after standing 20 minutes at room temperature. (The pH of the oxidative hair dye applied to new hair is as defined in claim 1)
It is an example which is outside the scope of the invention described in Nos. 6 to 6. (Comparative Example 8) Composition 7 (PH10.
1) is applied, and the composition 10 (PH1
0.1) was applied and left at room temperature for 20 minutes, followed by washing. (The pH of the oxidative hair dye applied to the already dyed hair is out of the scope of the invention described in claims 1 to 6, and the ΔH of the compositions 7 and 10 is out of the scope of the invention described in claim 3. Yes, ΔL is an example outside the scope of the invention described in claim 6.) e) Next, the hair bundles dyed in the above Examples and Comparative Examples were evaluated.

As items for evaluation, in Examples 1 and 2 and Comparative Examples 1 to 7, the feeling of the dyed portion, the vividness of the dyed portion, the lightness difference after hair dyeing, the lightness difference at the time of fading (the dyeing difference) The lightness difference between the hair part and the new hair part due to the difference in the degree of fading was evaluated. In Examples 3 to 6 and Comparative Example 8, the leveling property, the feeling of the already dyed portion, the lightness difference after hair dyeing, and the lightness difference at the time of fading were evaluated. Hereinafter, each evaluation method will be described.

(Feeling of the dyed part) The feeling of the dyed hair bundle after dyeing the hair (specifically, the goodness of the finger after dyeing the hair) was evaluated according to the following criteria. It is an evaluation of the degree of damage to the hair due to hair dyeing. ◎: Very good ○: Good △: Somewhat bad ×: Poor (Vividness of dyed part) The dyed hair bundle was visually observed for the color vividness after dyeing, and evaluated according to the following criteria. Things.

○: Vivid dyeing Δ: Dyeing lacking in vividness ×: Dyeing with dull feeling (difference in lightness after hair dyeing) Visual observation of hair bundle of new hair and hair dye of already dyed hair after dyeing Then, the difference in their brightness was evaluated based on the following criteria.

◎: No difference at all ○: Almost uniform Δ: Slight difference in lightness ×: Lightness difference is large (Lightness difference at the time of bleaching) ), The color was faded by the same operation as in the preparation of the hair bundle of the already dyed hair, followed by visual observation, and the difference in lightness was evaluated according to the following criteria.

[0067] ◎: absolutely no difference ○: almost uniform △: × slightly has brightness difference: brightness difference is large (levelness) for tufts of new hair tresses and Sundesomeke, visual observation after dyeing Then, (a) the difference in color tone between the new hair and the dyed hair, and (b) the presence or absence of color tone unevenness in each of the new hair and the dyed hair were evaluated based on the following criteria.

◎: There is no unevenness in color tone between the new hair and the already dyed hair, and the new hair and the already dyed hair have the same color ○: The new hair and the already dyed hair have almost the same color △: The new hair and the already dyed The color tone of the hair is slightly different. X: There is unevenness in each of the new hair and the dyed hair, and the color tone of the new hair and the dyed hair are different. Table 5 shows the evaluation results.

[0069]

[Table 5]

As shown in Table 5, Examples 1 to 6 satisfy the requirements of the invention described in claim 1, and are excellent in the feeling of the already dyed portion and the difference in brightness at the time of fading. In Examples 1 and 2, the vividness of the already-dyed portion is also excellent.
Further, in Example 3-4, since also meet the requirements of the invention described in claim 3 to 5, also has excellent levelness, Examples 3-5 satisfies the requirements of claim 6 It is excellent in lightness difference after hair dyeing.

Since Examples 5 and 6 do not satisfy the requirements of the invention described in Claims 3 to 5, they are inferior in levelness as compared with Examples 3 and 4. Example 6
Do not satisfy the requirements of Claim 6, and
5 is inferior to the lightness difference after hair dyeing.

On the other hand, the following comparative examples 1 to 8
This is an example outside the scope of the present invention. Comparative Example 1 is an example in which composition 1 having a pH of 9.95 was used for a dyed hair bundle, and the pH was out of the range of the present invention. Inferior to the difference.

In Comparative Example 2, the new hair bundle had PH of 8.37.
This is an example in which the composition 2 was used, and its pH was out of the range of the present invention, so that the difference in lightness at the time of fading was inferior. Comparative Example 3 shows composition 2 having a PH of 8.37 in a new hair bundle.
And the composition 1 having a PH of 9.95 was added to the already dyed hair bundle.
Is used, and since the PH of both compositions is outside the range of the present invention, the feeling of the already dyed portion and the difference in brightness at the time of fading are inferior.

Comparative Example 4 shows that the new hair bundle had a pH of 11.5.
Was used, and the pH of the dyed hair bundle was 11.5.
In this example, the pH of both compositions is out of the range of the present invention, so that the feeling of the already dyed portion and the difference in brightness at the time of fading are inferior. Comparative Example 5 is an example in which the composition 4 having a pH of 11.5 was used for a new hair bundle and the composition 6 having a pH of 6.82 was used for a dyed hair bundle. Is out of the range of the present invention, so that the brightness difference at the time of fading is inferior.

In Comparative Example 6, the dyed hair bundle had a pH of 6.82.
This is an example in which the composition 6 is used, and its pH is out of the range of the present invention, so that the vividness of the already-dyed portion and the difference in brightness at the time of fading are inferior. Comparative Example 7 shows that a new hair bundle has a PH of 1
An example of using a composition having 4 1.5, because the PH is outside the scope of the present invention, is inferior to the brightness difference during fading.

In Comparative Example 8, the composition 10 having a pH of 10.1 was used for the dyed hair bundle, and ΔH of the two compositions (composition 7 and composition 10) was 36.8. , △ L is 1
It is an example that is 7.37. Therefore, in Comparative Example 8, the PH of the composition 10 was out of the range of the present invention, and
Since H and ΔL are out of the range of the present invention, the touch of the already dyed portion, the lightness difference at the time of hair dyeing, the lightness difference at the time of fading, and the leveling property are inferior. The present invention is not limited in any way, and can be implemented in various forms without departing from the gist of the present invention.

For example, the mixing ratio of the first agent and the second agent is 1:
It can be set to 0.5 to 1.5.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a method of applying an oxidized hair dye composition separately.

FIG. 2 is an explanatory diagram illustrating a concept of a color tone.

FIG. 3 is an explanatory diagram showing a concept of a color tone.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yukako Yamada 1st place, Hazeki Hazeki, Oku-cho, Nagakute-cho, Aichi-gun, Aichi Prefecture Within the Research Institute of Hoyu Co., Ltd. (72) Inventor Takehito Imai Oku-cho, Nagakute-cho, Aichi County, Aichi Prefecture Hazegi No. 1-12 Hoyu Research Institute F-term (reference) 4C083 AB082 AB102 AB412 AC012 AC072 AC182 AC472 AC552 AC782 AD042 AD642 BB21 BB44 CC36 EE07 EE26

Claims (10)

[Claims] 1. A hair dyeing method using an oxidized hair dye composition containing a dye, an alkali agent, and an oxidizing agent, wherein the pH at the time of use is 9.5-11. 0 of alkaline oxidizing hair dye composition is applied, for Sundesomeke, characterized in that the PH in use is coated with a slightly alkaline oxidation hair dye composition of 7.5 to 9.4 Hair dyeing method. Wherein said alkaline oxidizing hair dye composition comprises hydrogen peroxide as an oxidizing agent, the slightly alkaline hair dye composition comprises hydrogen peroxide as an oxidizing agent, wherein the alkaline oxidation dye in use The hydrogen peroxide concentration in the hair composition is 2.0 to 4.0% by weight, and the hydrogen peroxide concentration in the slightly alkaline hair dye composition during use is 0.5 to 1.5% by weight. The hair dyeing method according to claim 1, wherein 3. A hue difference ΔH between a white hair bundle dyed using the alkaline oxidative hair dye composition and a white hair bundle dyed using the slightly alkaline oxidative hair dye composition is greater than 10. The hair dyeing method according to claim 1 or 2, wherein the hair coloring method is small. 4. A difference in chromaticity between a white hair bundle dyed with the alkaline oxidative hair dye composition and a white hair bundle dyed with the slightly alkaline oxidative hair dye composition, △ a and △. b
The hair dyeing method according to any one of claims 1 to 3, wherein each is less than 10. 5. The color difference ΔE between a white hair bundle dyed using the alkaline oxidative hair dye composition and a white hair bundle dyed using the slightly alkaline oxidative hair dye composition is smaller than 15. The hair dyeing method according to any one of claims 1 to 4, characterized in that: 6. The lightness difference ΔL between a white hair bundle dyed with the alkaline oxidative hair dye composition and a white hair bundle dyed with the slightly alkaline oxidative hair dye composition is 3 to 6. 13
The hair dyeing method according to any one of claims 1 to 5, wherein 7. A slightly alkaline oxidative hair dye composition to be used for dyed hair in the hair dyeing method according to claim 1, wherein the dye, an alkali agent and an oxidizing agent are used. An oxidative hair dye composition comprising a pH of 7.5 to 9.4 when used. 8. The method according to claim 1, wherein the oxidizing agent contains hydrogen peroxide, and the hydrogen peroxide concentration in use is 0.5 to 1.5% by weight.
The oxidative hair dye composition according to claim 7, wherein: 9. An alkaline oxidative hair dye composition used for new hair and a slightly alkaline oxidative hair dye used for already-dyed hair according to the hair dyeing method according to claim 1. A hair dyeing product comprising a composition, wherein the alkaline oxidative hair dye composition and the slightly alkaline oxidative hair dye composition each include a dye, an alkaline agent, and an oxidizing agent, PH at the time of using the oxidative hair dye composition is 9.
5 to 11.0, and the pH at the time of using the slightly alkaline oxidative hair dye composition is 7.5 to 9.4. 10. The alkaline oxidative hair dye composition and the slightly alkaline oxidative hair dye composition each contain hydrogen peroxide, and the alkaline oxidative hair dye composition at the time of use is used. The concentration of hydrogen oxide is 2.0 to 4.0% by weight, and the concentration of hydrogen peroxide in the slightly alkaline oxidative hair dye composition during use is 0.5 to 1.5% by weight. The hair coloring article according to claim 9.