JP2024039696A - Hair color treatment method - Google Patents

Abstract

An object of the present invention is to provide a hair color treatment method capable of prolonging the state after bleaching. [Solution] A hair color treatment method includes a bleaching treatment (step S1) in which hair is bleached using a bleaching agent, a first water washing treatment (step S2) in which the bleached hair is washed with water, and a first water washing treatment. After that, a boosting agent is added to the hair bleached by the bleaching treatment, which further bleaches the hair and makes the period in which the state after further bleaching is maintained longer than the period in which the state after bleaching is maintained by the bleaching agent. The method includes a boost treatment (step S3) in which the boosted hair is applied, and a second water washing treatment (step S4) in which the boost-treated hair is washed with water. [Selection diagram] Figure 1

Description

Application filed for application of Article 30, Paragraph 2 of the Patent Act Implementation date: November 14, 2021 Implementation location: Barbar shop KANSAI, 19-9 Ikedahonmachi, Neyagawa City, Osaka Prefecture Implementation content: Hirose, the inventor of the invention related to the above application number Yoshihiro and Mariko Hirose implemented the invention "hair color treatment method" on a third party on the above implementation date and at the above implementation location.

The present invention relates to a hair color treatment method.

BACKGROUND ART It is known that hair is bleached using a bleaching agent as one of the treatments or pre-treatments for coloring hair (see Patent Document 1).

Special table 2002-509519

By the way, when it is desired to make the hair white, for example, the hair is bleached using a bleaching agent and then washed with a purple shampoo to make the hair white. Here, the effects of purple shampoo are as follows.

When hair is bleached with a bleaching agent, the hair becomes "pale yellow". When this hair is treated with purple shampoo, purple dye adheres to the hair. Then, since purple is almost the complementary color of yellow, the hair becomes white.

However, after 2 to 5 days, the whitened hair turned yellow, requiring bleaching and purple shampoo treatment again. Such problems are common not only when bleaching human hair but also when bleaching hair other than human hair and hair of animals other than humans.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a hair color treatment method that can prolong the state after bleaching.

In order to achieve the above object, a hair color treatment method according to an aspect of the present disclosure includes a bleaching treatment in which hair is bleached using a bleaching agent, and a first washing in which the bleached hair is washed with water. After the treatment and the first water washing treatment, the hair bleached by the bleaching treatment is further bleached and the state after the bleaching is maintained for a period of time during which this further bleached state is maintained. The method includes a boost treatment in which a boosting agent is applied for a longer period of time than the period in which the hair is treated, and a second water washing treatment in which the boosted hair is washed with water.

INDUSTRIAL APPLICATION This invention has the effect of being able to provide the hair color treatment method which can prolong the state after bleaching.

FIG. 1 is a flowchart illustrating an example of a hair color processing method according to Embodiment 1 of the present disclosure. FIG. 2 is a photograph showing a state in which a mesh cap is attached to the head of a patient. FIG. 3 is a photograph showing the bleach applied to hair. FIG. 4 is a photograph showing the state immediately after the boost agent has been applied to the hair. FIG. 5 is a photograph showing the state of hair after the boost agent is applied to the hair and left for a predetermined period of time. FIG. 6 is a flowchart illustrating an example of a hair color processing method according to Embodiment 2 of the present disclosure. FIG. 7 is a photograph showing the state of the hair with the mesh cap removed after the purple shampoo and water washing treatment. FIG. 8 is a flowchart illustrating an example of a hair color processing method according to Embodiment 3 of the present disclosure.

(Discovery that led to the present invention)
The present inventors have made extensive studies to solve the above problems. In the process, the hair is bleached using a bleaching agent, washed with water, and then a specific composition is applied, and the hair is further bleached, albeit slightly, to an "almost white" color, and discovered that the period during which this state after further bleaching is maintained is longer than the period during which the state after bleaching with a bleaching agent is maintained.

This particular composition is referred to herein as a "boost agent." Further, this further bleaching is called "additional bleaching", and the effect of additional bleaching is called "additional bleaching effect". Further, the effect that the period during which the state after further bleaching is maintained is longer than the period during which the state after bleaching with the bleach is maintained is referred to as "effect of prolonging the period for maintaining the state after bleaching". Moreover, the "state after bleaching" includes both a state after only additional bleaching is applied to the hair and a state after the hair is subjected to additional bleaching and whitening. The reason why the above-mentioned specific composition is called a "boosting agent" is that this specific composition enhances the bleaching effects of bleaching agents, such as "additional bleaching effect" and "effect of prolonging the post-bleaching state maintenance period." This is because it has the effect of further boosting (pushing up or reinforcing).

In other words, the present inventors have discovered a new composition called a boost agent and the novel effects of "additional bleaching effect" and "effect of prolonging the state maintenance period after bleaching" produced by this new composition. .

Specifically, the following was discovered.

After bleaching the hair using a bleaching agent and washing the hair with water, apply the first part (specific composition) of Creator (registered trademark) T72 perm solution manufactured by Shiseido, and then wash with water. The color was further bleached from "pale yellow", which was the color immediately after bleaching with the agent, to "almost white". The "almost white" state of the additionally bleached hair was maintained for about 10 to 14 days, and after this maintenance period, the hair changed color to a "yellow color."

Additionally, this additionally bleached hair was given a purple shampoo and then washed with water to make the hair "white". This "white" state of the white hair was maintained for about one to two months, and after this maintenance period, the hair changed color to a "yellow color."

Then, when the first agent (specific composition) of Shiseido's Creator (registered trademark) T72 perm liquid is applied again to the hair that has changed to a "yellow color" and washed with water, the hair will be changed again. The color was bleached to "almost white" and this "almost white" state was maintained for about 1 to 2 months. Afterwards, this hair changed color to a ``yellow color,'' but it was possible to return it to an ``almost white'' bleached state using a boosting agent. The effect of this boost agent on bleaching hair that has turned yellowish to "almost white" and the effect of maintaining that "almost white" state for about 1 to 2 months are different from the "additional effects" of the boost agent. This effect is considered to be a different form of the "bleaching effect" and the "effect of prolonging the state maintenance period after bleaching."

The present inventors tested a number of perm solutions to see if they functioned as boost agents. However, only the first agent of Shiseido's Creator (registered trademark) T72 perm liquid functioned as a boost agent. In addition, the present inventors have analyzed which ingredients make the first agent of Shiseido's Creator (registered trademark) T72 perm liquid function as a boost agent, and are currently continuing this analysis. And I haven't been able to identify it. Furthermore, the mechanism by which the first agent of Shiseido's Creator (registered trademark) T72 perm liquid functions as a boost agent is also unknown.

Although some aspects of the invention remain to be elucidated, the present inventors have discovered that the effects of bleaching using a bleaching agent are ``additional bleaching effect'' and ``effect of prolonging the state maintenance period after bleaching''. It is an undeniable fact that we have discovered a new composition called a boosting agent that has a novel boosting effect. At present, only one type of boosting agent has been discovered.

Here, hair other than human hair and hair of animals other than humans have the same main chemical composition as human hair. Therefore, the present invention can be applied to hair other than human hair and hair of animals other than humans, in the same way as when the present invention is applied to human hair.

The present invention has been made based on this discovery.

(Summary of this disclosure)
Therefore, a hair color treatment method according to an aspect of the present disclosure includes a bleaching treatment of bleaching the hair using a bleaching agent, a first water washing treatment of washing the bleached hair with water, and a first washing treatment of washing the bleached hair with water. After the water washing treatment, the hair bleached by the bleaching treatment is further bleached, and the period during which the state after further bleaching is maintained is compared to the period during which the state after bleaching with the bleaching agent is maintained. The method includes a boost treatment in which a lengthening boosting agent is applied, and a second washing treatment in which the boosted hair is washed with water. Here, "hair" means human hair and non-human animal hair.

According to this configuration, the boost treatment further bleaches the hair after bleaching with the bleach, and the period during which the state after further bleaching is maintained is the period during which the state after bleaching with the bleach is maintained. It is longer compared to As a result, it is possible to provide a hair color treatment method that allows hair to remain in a long-lasting state after bleaching. Furthermore, the boost treatment bleaches the hair color from "pale yellow", which is the color of hair after bleaching with bleach, to "almost white", so you don't have to whiten your hair with purple shampoo. It can be almost whitened just by decolorization treatment.

The boost agent may be a composition whose producer and/or seller is Shiseido Co., Ltd. and whose product name is Creator (registered trademark) T72 first agent.

According to this configuration, the effects of the above-described boost processing can be suitably obtained.

The method may further include a whitening process in which the hair washed in the second water washing process is made white using a purple shampoo.

According to this configuration, the period during which the whitened state is maintained is longer than the period during which the whitened state is maintained after the hair is bleached with the bleach. As a result, the whitened state can be maintained for a long time.

The method may further include a coloring process in which the hair washed in the second water washing process is colored other than white. Here, "coloring" means making the hair a color other than "white".

According to this configuration, the period during which the colored state is maintained is longer than the period during which the colored state is maintained after the hair is bleached with a bleaching agent. As a result, the colored state can be maintained for a long time.

Hereinafter, specific embodiments of the present disclosure will be described with reference to the drawings. In addition, below, the same reference numerals are given to the same or equivalent element throughout all the drawings, and the overlapping explanation will be omitted. In addition, since the following figures are diagrams for explaining the present disclosure, if elements unrelated to the present disclosure are omitted, if dimensions are not accurate due to exaggeration etc., if dimensions are simplified, if multiple In the diagram, there are cases where the shapes of elements that correspond to each other do not match. Further, the present disclosure is not limited to the following embodiments.

<Applicable target of color processing method>
The color treatment method of the embodiment of the present disclosure is applied to color treatment of animal hair. Below, a case where the color treatment method of the embodiment of the present disclosure is applied to color treatment of human hair will be illustrated. The color processing method of the embodiment of the present disclosure can also be applied to hair other than human hair and hair of animals other than humans, in the same manner as exemplified below.

(Embodiment 1)
FIG. 1 is a flowchart illustrating an example of a hair color processing method according to Embodiment 1 of the present disclosure.

Referring to FIG. 1, the hair color treatment method of Embodiment 1 includes a bleaching process (step S1) in which the hair is bleached using a bleaching agent, and a first washing process (step S2) in which the bleached hair is washed with water. After the first water washing treatment, the hair bleached by the bleaching treatment is further bleached, and the period during which the state after further bleaching is maintained is compared to the period during which the state after bleaching with the bleach is maintained. The method includes a boosting process (step S3) in which a boosting agent is applied to lengthen the hair, and a second washing process (step S4) in which the boosted hair is washed with water. Each process will be explained in detail below.

<Bleaching treatment>
A well-known decolorization process can be applied to the decolorization process of Embodiment 1. Therefore, a detailed explanation will be omitted and a brief explanation will be given.

First, prepare bleach. A commercially available bleaching agent can be used as the bleaching agent. Commercially available bleaching agents may be adjusted in concentration or combined as appropriate. Further, necessary components may be added to a commercially available bleaching agent as appropriate.

For example, as a bleaching agent, a two-part bleaching agent composed of the following first part and second part can be used.

{First agent}
A mixture of powder A and liquid B.

Powder A: “H&O Powder Bleach” (product name)
Liquid B: “POWDER BLEACH Shiseido” (product name)
Mixing ratio A:B=1:0.2
This mixing ratio is a volume ratio.

"H&O Powder Bleach" contains ammonium persulfate and potassium persulfate as active ingredients, and other ingredients include anhydrous Na metasilicate, Al stearate, dextrin, Mg carbonate, Na carboxymethylcellulose, Na Rariul sulfate, and edetate diammonium. Contains Na, sorbitol, dipotassium glycyrrhizinate, gunjo, liquid paraffin, and fragrance.

"POWDER BLEACH Shiseido" is a bleaching agent and contains persulfate.

{Second agent}
"H&O OXI6%" (product name)
"H&O OXI 6%" contains hydrogen peroxide as an active ingredient, and other ingredients include stearyltrimethylammonium chloride, isopropanol, cetostearyl alcohol, polyoxyethylene cetyl ether, isopropyl myristate, oleic acid, phenoxyethanol, and hydroxyl. Contains ethanediphosphonic acid liquid, diethylene glycol monoethyl ether, PG, pH adjuster, viscosity adjuster, and purified water.

{Bleach agent}
A bleaching agent to be applied is prepared by mixing the first agent and the second agent at a ratio of, for example, 1:2 to 2.5. Of course, the mixing ratio may be changed depending on the condition of the hair (for example, how damaged the hair is).

Note that a one-part or three-part bleaching agent may be used.

Next, a bleaching agent is applied to the hair on the recipient's head. Bleaching may be applied to the hair on the entire head, or may be applied to a portion of the hair using a mesh cap. If bleaching is applied to the entire head of hair, apply bleach to the entire head of hair. When bleaching a portion of the hair on the head, apply bleach to the hair exposed through the mesh cap. In the following, a case where a mesh cap is used will be exemplified, but even when a mesh cap is not used, the contents of each process are the same as those described below. Further, this also applies to the second embodiment and the third embodiment. FIG. 2 shows a state in which the mesh cap is attached to the head of the patient.

After leaving it for an appropriate period of time, the applied bleach is scraped off with a comb, for example (see FIG. 3).

<First water washing process>
Next, the bleach applied to the hair is washed with water as appropriate.

The washed hair may or may not be dried. Do not dry the washed hair here.

The color of the hair after washing with water is "light yellow" when visually observed. The color of the hair after washing with water is shown in FIG. FIG. 4 shows the color of the hair immediately after applying the boost agent, which is substantially the same as the color of the hair immediately after applying the bleach and washing with water. Since FIG. 4 is a black and white photograph, the color of the hair, which is visually "light yellow", appears white in FIG. This "light yellow" visually observed can be expressed using the L*a*b* color system (hereinafter simply referred to as the L*a*b* color system) of the Commission Internationale de Illumination (CIE), for example: It corresponds to "L*=74.87, a*=-1.11, b*=17.92" ("light yellow with yellowish green") (see Comparative Example 3 in Table 2).

<Boost processing>
First, prepare a boost agent. The boost agent can further bleach the hair that has been bleached by the bleaching treatment using the bleaching agent, and can extend the period during which the state after the further bleaching is maintained compared to the period during which the state after the bleaching treatment is maintained. It is fine as long as it is something. As such a boost agent, for example, the first agent of Creator (registered trademark) T72 perm liquid manufactured by Shiseido can be used. Hereinafter, "Creator (registered trademark) T72 perm liquid manufactured by Shiseido" will be referred to as "T72 liquid", and "Creator (registered trademark) T72 perm liquid manufactured by Shiseido 1st agent" will be referred to as "T72 liquid 1st agent". It is called. As a premise, the boost agent is required not to cause damage beyond the permissible limit to the "hair" (here, the hair) and the animal's body (here, the head).

T72 liquid first agent contains ammonium thioglycolate liquid as an active ingredient, and other ingredients include purified water, strong aqueous ammonia, ethanol, ammonium hydrogen carbonate, amidopropyl betaine laurate liquid, diammonium hydrogen phosphate, and polyester. Contains methacryloylethyl dimethyl betaine liquid, polyoxyethylene polyoxypropylene decyl tetradecyl ether, stearyltrimethylammonium chloride, hydroxyethane diphosphonic acid liquid, L-arginine, L-glutamic acid, and fragrance.

The T72 liquid first agent can be used as a undiluted solution or after diluting the undiluted solution with water, which is a solvent for the undiluted solution. When using a diluted stock solution, it is preferable that the concentration of the diluted stock solution is 50% or more. If the concentration of the diluted stock solution is 50% or more, hair that has been bleached by bleaching treatment with a bleaching agent can be further bleached.

The boost agent may contain various additional components (components other than water as a solvent) in addition to the T72 liquid first agent. This additional component may be, for example, a supplementary alkali suitable for healthy hair. This additional component may also be, for example, an auxiliary alkali suitable for damaged hair. These can reduce the damage that the boost treatment causes to hair.

Next, the prepared boost agent is applied to the washed hair (see FIG. 4). The hair coated with the boost agent is then left alone (see Figure 5). The standing time is 0 to 2 minutes. If you leave it on for less than 2 minutes, there will be no serious damage to your hair. During this standing time, the color of the hair was bleached from "pale yellow" to "almost white," but this color change cannot be seen in the black and white photographs of FIGS. 4 and 5. This visual "almost white" is represented by the color of the L*a*b* color system, for example, "L*=73.97, a*=-1.87, b*=11.53" ("almost white"). (See Example 3 in Table 2).

<Second water washing treatment and finishing>
Next, the boost agent applied to the hair is washed with water as appropriate. Then, remove the mesh cap from the head and dry the washed hair.

The color of the hair after washing with water is "almost white" when visually observed. Note that FIG. 7 shows the state of hair that has been further treated with purple shampoo and treatment after the second washing process, but the state of the hair after washing here is different from the state of the hair in FIG. 7 except for the hair color. The same is true.

The hair that has been washed and dried may be left as is or may be treated as appropriate. Commercially available treatment agents can be used. Therefore, detailed explanation thereof will be omitted. Here, as the treatment agent, for example, "Schwarzkopf After Bleach Treatment" (trade name) can be used.

<Treatment of yellowed hair>
After finishing, the hair remains "almost white" for about 10 to 14 days. After this maintenance period has passed, the hair visually changes color to a "yellow color." This "yellow color" also appears white in black and white photographs, so I will not show the condition of this hair in photographs.

When this yellowed hair is subjected to the above-mentioned "boost treatment" and "second washing treatment and finishing", the color of the hair returns to its original "almost white" color.

<Effects of Embodiment 1>
As described above, according to Embodiment 1, the color of the hair is bleached from "light yellow", which is the color of hair after bleaching with a bleaching agent, to "almost white" by the boost treatment. Therefore, hair can be almost whitened only by bleaching treatment, without having to whiten the hair with a purple shampoo as in the past.

Further, as shown in (Example) described below, the state after bleaching with the bleaching agent is maintained for only 5 days, but according to Embodiment 1, as described above, the state after additional bleaching with the boost treatment is maintained for 10 days. It is maintained for about 1-14 days. Therefore, according to the first embodiment, the period during which the state after additional bleaching is maintained can be made longer than the period during which the state after bleaching with the bleach is maintained. As a result, it is possible to maintain the state after decolorization for a long time.

(Embodiment 2)
FIG. 6 is a flowchart illustrating an example of a hair color processing method according to Embodiment 2 of the present disclosure.

Referring to FIG. 6, the hair color treatment method of Embodiment 2 includes a bleaching process (step S1) in which the hair is bleached using a bleaching agent, and a first washing process (step S2) in which the bleached hair is washed with water. After the first water washing treatment, the hair bleached by the bleaching treatment is further bleached, and the period during which the state after further bleaching is maintained is the period during which the state after bleaching with the bleach is maintained. A boost treatment (step S3) in which a boosting agent is applied to lengthen the hair compared to the hair, a second washing treatment (step S4) in which the boost-treated hair is washed with water, and the hair washed with water in the second washing treatment is turned white with a purple shampoo. The method includes a whitening process (step S5), and a third water washing process (step S6) in which the whitened hair is washed with water.

Here, since the decolorization process (step S1) to the boost process (step S3) are the same as in the first embodiment, their explanation will be omitted. ) and the third water washing process (step S6) will be explained in detail.

<Second water washing process>
In the second embodiment, after the second water washing process (step S4), a whitening process using purple shampoo (step S5) is performed. Therefore, in the second washing process, after the boost agent applied to the hair is washed with water, the whitening process is basically performed without drying the hair. Of course, after washing the boost agent applied to the hair with water, the hair may be dried to perform the whitening treatment.

<Whitening treatment>
A well-known whitening treatment can be applied to the whitening treatment using the purple shampoo in Embodiment 2. Therefore, a detailed explanation of the whitening treatment using a purple shampoo for hair that has been additionally bleached by the boost treatment will be omitted and will be briefly described.

First, prepare purple shampoo. A commercially available purple shampoo can be used.

Here, as the purple shampoo, for example, "Schwarzkopf GOOBY YELLOW" (trade name) can be used.

Next, the washed hair is shampooed using purple shampoo.

<Third water washing treatment and finishing>
The shampoo-treated hair is then appropriately washed with water.

Then, remove the mesh cap from the head and dry the washed hair.

The color of the hair after washing with water is visually "white". This visual "white" is expressed in terms of the L*a*b* color system, for example, "L*=64.00, a*=-1.63, b*=0.03" ("substantially white") (See Example 4 in Table 2).

The hair that has been washed and dried may be left as is or may be treated as appropriate. The treatment process is the same as in the first embodiment. FIG. 7 shows the condition of the hair after this treatment.

<Treatment of yellowed hair>
After finishing the hair, the white state of the hair is maintained for about one to two months, and after this maintenance period, the hair changes color to a yellowish color.

When this yellowed hair is subjected to the above-mentioned "boost treatment", "second washing treatment", "whitening treatment", and "third washing treatment and finishing", the hair color returns to its original "white" color. .

<Effects of Embodiment 2>
As described above, according to Embodiment 2, as shown in (Example) described below, the state after decolorization with bleach and whitening with purple shampoo is maintained for only 5 days, but according to Embodiment 2 As mentioned above, the state after additional bleaching by boost treatment and whitening by purple shampoo is maintained for about 1 to 2 months. Therefore, according to the second embodiment, the period during which the state after additional bleaching is maintained can be made longer than the period during which the state after bleaching with the bleach is maintained. As a result, it is possible to maintain the state after decolorization for a long time.

(Embodiment 3)
FIG. 8 is a flowchart illustrating an example of a hair color processing method according to Embodiment 3 of the present disclosure.

Referring to FIG. 8, the hair color treatment method of Embodiment 3 includes a bleaching process (step S1) in which the hair is bleached using a bleaching agent, and a first washing process (step S2) in which the bleached hair is washed with water. After the first water washing treatment, the hair bleached by the bleaching treatment is further bleached, and the period during which the state after further bleaching is maintained is the period during which the state after bleaching with the bleach is maintained. A boost treatment (step S3) in which a boosting agent is applied to make the hair longer than the other hair, a second washing treatment (step S4) in which the boosted hair is washed with water, and the hair washed in the second washing treatment is colored in a color other than white. The coloring process includes a coloring process (step S7), and a fourth washing process (step S8) that washes the colored hair with water.

Here, since the decolorization process (step S1) to the boost process (step S3) are the same as in the first embodiment, their explanation will be omitted, and the second water washing process (step S4), coloring process (step S7), and The fourth water washing process (step S8) will be explained in detail.

<Second water washing process>
In the third embodiment, a coloring process (step S7) is performed after the second water washing process (step S4). There are various types of coloring treatments that make hair colors other than white. Therefore, in the second washing process, after the boost agent applied to the hair is washed with water, the coloring process is performed without drying the hair or by drying the hair, depending on the type of coloring process.

<Colorization processing>
A well-known method can be applied to the coloring treatment for coloring hair in a color other than white in Embodiment 3. Therefore, a detailed explanation of the coloring process that changes hair that has been additionally bleached by the boost process to a color other than white will be omitted and will be briefly described.

Coloring treatments that make hair a color other than white include i) hair coloring, hair dye, gray hair dyeing, fashion dyeing using permanent hair dyes, ii) hair manicure, acid coloring, color rinse using semi-permanent hair dyes, Color treatments, iii) Hair color sprays, hair mascaras, color sticks using temporary hair dyes or hair colorants.

Here, for example, the hair is colored using a hair color.

<Fourth washing treatment and finishing>
Next, the color-treated hair is washed with water as appropriate.

Then, the mesh cap is removed from the head, the washed hair is dried, and then the hair is finished as appropriate.

<Effects of Embodiment 3>
According to Embodiment 3, the period during which the state after additional bleaching is maintained can be made longer by the boost treatment compared to the period during which the state after bleaching with the bleach is maintained. Therefore, it is possible to maintain the state after the coloring process for a long time.

(Example)
<Sample contents>
In this example, the hair color treatment method of the present disclosure was applied to a part of the hair on the head of a treatment subject (person) using a mesh cap. Therefore, the sample in this example is a part of the hair on the head of the subject (hereinafter simply referred to as "hair").

{Comparative example 1}
The hair was bleached using a bleaching agent, washed with water, and finished.

The bleaching agent was prepared by mixing the first agent and the second agent at a ratio of 1:2. The first agent is made by mixing powder A: "H&O Powder Bleach" (trade name) and liquid B: "POWDER BLEACH Shiseido" (trade name) at a mixing ratio of A:B = 1:0.2. Created. The second agent is "H&O OXI 6%" (trade name).

The treatment method is as follows.

First, apply bleach to the entire hair exposed through the mesh cap on the patient's head, i) leave it for 30 to 35 minutes, ii) then cover the head with a wrap, and iii) iv) Then, the wrap material and towel were removed from the hair, and the bleach was scraped off with a comb. This process i) to iv) was repeated three times.

The head was then washed with lukewarm water to wash away the bleach, with the mesh cap still on.

Next, the mesh cap was removed from the head and the hair was finished with a treatment agent. The treatment agent is "Schwarzkopf After Bleach Treatment" (trade name).

{Comparative example 2}
First, as in Comparative Example 1, decolorization treatment was performed using a bleaching agent.

Next, the hair, in which the bleach had been washed away with lukewarm water, was subjected to a whitening treatment using purple shampoo. The purple shampoo is "Schwarzkopf GOOBY YELLOW" (trade name).

Next, the mesh cap was removed from the head and the hair was finished with a treatment agent. The treatment agent is "Schwarzkopf After Bleach Treatment" (trade name).

{Example 1}
First, as in Comparative Example 1, decolorization treatment was performed using a bleaching agent.

Next, the boost agent was applied to the hair after washing off the bleach with lukewarm water, rubbed in, and left for 2 minutes. The boost agent was created by adding an auxiliary alkali suitable for healthy hair and an auxiliary alkali suitable for damaged hair to the stock solution of the T72 first agent.

The head was then washed with lukewarm water to wash away the boost agent while still wearing the mesh cap.

Next, the mesh cap was removed from the head and the hair was finished with a treatment agent. The treatment agent is "Schwarzkopf After Bleach Treatment" (trade name).

{Example 2}
First, in the same manner as in Example 1, decolorization treatment using a bleaching agent and boosting treatment using a boosting agent were performed.

Next, the hair, in which the boost agent had been washed away with lukewarm water, was subjected to a whitening treatment using purple shampoo. The purple shampoo is "Schwarzkopf GOOBY YELLOW" (trade name).

Next, the mesh cap was removed from the head and the hair was finished with a treatment agent. The treatment agent is "Schwarzkopf After Bleach Treatment" (trade name).

<Sample evaluation>
For Comparative Example 1, Comparative Example 2, Example 1, and Example 2, the color of the hair after the final treatment was visually evaluated.

この評価結果によれば、比較例１は、最終処理後の毛髪の色が「薄黄色」であり、毛髪を白色化することができなかった。また、その色が維持される期間が５日であり、脱色後の状態を長持ちさせることができなかった。 The evaluation results are shown in Table 1.

According to the evaluation results, in Comparative Example 1, the hair color after the final treatment was "light yellow" and the hair could not be whitened. Furthermore, the color was maintained for only 5 days, making it impossible to maintain the state after decolorization for a long time.

In Comparative Example 2, the color of the hair after the final treatment was "white", and the hair could be whitened. However, the color was maintained for only 5 days, and the state after whitening (after bleaching) could not be maintained for a long time.

In Example 1, the color of the hair after the final treatment was "almost white", and the hair could be substantially whitened without using a purple shampoo. In addition, the color was maintained for 14 days, and the state after decolorization could be maintained for a long time.

In Example 2, the color of the hair after the final treatment was "white", and the hair could be whitened. In addition, the color was maintained for two months, and the state after whitening (after bleaching) could be maintained for a significantly longer period of time.

As is clear from the above description, according to the present example, hair after bleaching with a bleaching agent is further bleached by the color treatment method of the present disclosure, and the period during which this further bleached state is maintained is as follows: It has been demonstrated that the condition is maintained for a longer period of time after bleaching with the bleaching agent.

<Color measurement using L*a*b* color system>
The color change of each sample in the above examples can be clearly identified visually. However, since these colors cannot be objectively identified when expressed in words, color measurements using the L*a*b* color system are used to make these colors correspond to the colors of the L*a*b* color system. I did it. This is shown in Table 2.

{Creating a sample}
The color measurements shown in Table 2 were performed using samples of Comparative Example 3-4 and Example 3-6, which were exclusively used for color measurement. These samples were created by cutting the hair of the practitioner and tying the cut hair into the required number of bundles. These samples were then subjected to the same hair color treatment as in the above-mentioned (Example).

In Comparative Example 3, the same hair color treatment as in Comparative Example 1 was performed.

In Comparative Example 4, the same hair color treatment as in Comparative Example 2 was performed.

In Example 3, the same hair color treatment as in Example 1 was applied.

In Example 4, the same hair color treatment as in Example 2 was applied.

In Example 5, the hair color treatment was basically the same as in Example 1. However, decolorization treatment using a bleaching agent was performed three times. Further, the boost treatment was performed using a boost agent prepared by setting the concentration of T72 first agent to 50% and adding thereto an auxiliary alkali suitable for healthy hair and an auxiliary alkali suitable for damaged hair. The sample was then left for two months.

In Example 6, the same hair color treatment as in Example 2 was applied. The sample was then left for two months.

{Measuring method}
For each sample, a bundle of hair was used as a measurement sample. Four measurement samples were prepared for each sample. The color value of the L*a*b* color system was measured using a SPECTROPHOTOMETER SE6000 spectrophotometer manufactured by Nippon Denshoku Industries Co., Ltd. As a measurement condition, reflected light from the measurement sample was measured. For each sample, the measured values of the four measurement samples were obtained, their average value was determined, and the average value was taken as the color value of each sample in the L*a*b* color system.

このＬ＊ａ＊ｂ＊表色系による色測定では、同一サンプルについて、最終処理直後の色と２ヶ月経過時の色とを測定しておらず、同様の脱色処理又は脱色処理及び白書化処理を行った別々のサンプルについて、最終処理直後の色と２ヶ月経過時の色とを測定した。従って、同様の脱色処理又は脱色処理及び白書化処理を行ったサンプルについて、最終処理直後の色から２ヶ月経過時の色への正確な変化を知ることはできないが、最終処理直後の色から２ヶ月経過時の色へのおよその変化を知ることはできる。 {Measurement result}
The measurement results are shown in Table 2.

In this color measurement using the L*a*b* color system, the color immediately after the final treatment and the color after 2 months of the same sample are not measured, and the same sample is subjected to the same bleaching treatment or bleaching treatment and whitening treatment. The color immediately after the final treatment and the color after 2 months were measured for the separate samples subjected to the above treatment. Therefore, it is not possible to know the exact change in color from the color immediately after the final treatment to the color after two months for samples that have been subjected to the same bleaching treatment or bleaching treatment and whitening treatment, but it is not possible to know the exact change in color from the color immediately after the final treatment to the color after two months. It is possible to know the approximate change in color as months pass.

Here, in the L*a*b* color system, L* represents lightness, and a* and b* represent chromaticity consisting of hue and saturation. Further, +a* represents saturation in the red direction, +b* represents saturation in the yellow direction, -a* represents saturation in the green direction, and -b* represents saturation in the blue direction. Therefore, for white, a*=0 and b*=0.

Specifically, the color of the hair immediately after the final treatment (Comparative Example 3) in which the hair was bleached using a bleaching agent was "light yellow" when visually observed. On the other hand, according to the L*a*b* color system, "L*=74.87, a*=-1.11, b*=17.92". That is, the color is high in brightness and bright. The hue is "almost yellow with a yellow-greenish color" and its saturation is low, making it a "dull color." Therefore, if the color based on this L*a*b* color system is expressed in words, it can be said to be "pale yellow with a yellow-green bias." Therefore, the color of the hair when visually observed is almost the same as the color based on the L*a*b* color system.

When bleaching with a bleaching agent was performed, the hair color immediately after the final treatment with purple shampoo (Comparative Example 4) was "white" when observed visually. On the other hand, according to the L*a*b* color system, "L* = 70.96, a* = -0.73, b* = 17.702" is obtained. In other words, the color is bright with high brightness. The hue is "almost yellow leaning toward yellow-green," and the saturation is low, making it a "dull color." Therefore, the color according to this L*a*b* color system can be expressed in words as "light yellow leaning toward yellow-green." Therefore, the color of the hair is slightly different between the visual color and the color according to the L*a*b* color system. However, compared to the case where only bleaching with a bleaching agent was performed, the brightness is slightly lower and the saturation in the yellow direction is slightly lower. Therefore, even in terms of the color measured in the L*a*b* color system, this color is undoubtedly "whiter" than when bleaching is used.

The color of the hair immediately after the final treatment (Example 3) when the boost treatment was performed after the bleaching treatment with a bleaching agent was "almost white" according to visual observation. On the other hand, according to the L*a*b* color system, "L*=73.97, a*=-1.87, b*=11.53". That is, it is a bright color with high brightness. The hue is ``almost yellow with a yellow-greenish tone,'' but the saturation is quite low, and the color is ``so dull that it is difficult to distinguish the hue.'' Therefore, if the color based on this L*a*b* color system is expressed in words, it can be said to be "almost white." Therefore, the hair color visually matches the color determined by the L*a*b* color system. Compared to the case where only the bleaching treatment was performed, the brightness was lower by 0.90, and the saturation in the yellow direction was lower by 6.39. It is presumed that the decrease in brightness is due to the hair becoming more transparent (transmittance increased). A decrease of "6.39" in yellow saturation means that the hair has become "almost white." The numerical data confirms that the hair bleached by the bleaching agent was further bleached by the boost treatment.

The color of the hair immediately after the final treatment (Example 4) in which the purple shampoo treatment was performed after the bleaching treatment and the boost treatment with a bleaching agent was "white" according to visual observation. On the other hand, according to the L*a*b* color system, "L*=64.00, a*=-1.63, b*=0.03". That is, it is a bright color with high brightness. The hue is "almost yellow with a yellow-greenish color," but the saturation is close to zero, making it "substantially white." Therefore, the hair color visually matches the color determined by the L*a*b* color system. Compared to the case where only the bleaching treatment and boosting treatment were performed, the brightness was numerically lower by 9.97, and the saturation in the yellow direction was numerically lower by 11.50. It is presumed that the decrease in brightness is due to dye adhering to the hair, resulting in a significant decrease in reflectance. A decrease in saturation of "11.50" in the yellow direction means that the hair has become substantially "white". The numerical data confirms that hair that has been bleached by bleach and boost treatment is whitened by purple shampoo treatment.

When the boost treatment was performed after the bleaching treatment with a bleaching agent, the color of the hair two months after the final treatment (Example 5) was "almost white" according to visual observation. On the other hand, according to the L*a*b* color system, "L*=59.44, a*=-0.86, b*=5.44". That is, it is a bright color with high brightness. The hue is ``almost yellow with a yellow-greenish tone,'' but the saturation is quite low, and the color is ``so dull that it is difficult to distinguish the hue.'' Therefore, if the color based on this L*a*b* color system is expressed in words, it can be said to be "almost white." Therefore, the hair color visually matches the color determined by the L*a*b* color system. Compared to the case immediately after final processing, the brightness is numerically lower by 14.53, and the saturation in the yellow direction is numerically lower by 6.09 (becomes whiter). It is presumed that the decrease in brightness is due to deterioration of the hair over time. On the other hand, hair usually turns yellow over time after final treatment, but here it turns white, and it is unlikely that it will turn out that way, so the saturation in the yellow direction is The decrease of "6.09" is presumed to be an error due to different samples. However, numerical data confirms that when a boost treatment is performed after decolorization treatment with a bleaching agent, the decolorization state is maintained even after two months have passed.

The color of the hair after 2 months from the final treatment (Example 6) in which the purple shampoo treatment was performed after the bleaching treatment and the boost treatment with a bleaching agent was "white" according to visual observation. On the other hand, according to the L*a*b* color system, "L*=59.23, a*=-1.63, b*=0.43". That is, it is a bright color with high brightness. The hue is "almost yellow with a yellow-greenish color," but the saturation is close to zero, making it "substantially white." Compared to the case immediately after final processing, the brightness is numerically lower by "4.77" and the saturation in the yellow direction is numerically higher by "0.40". It is presumed that the slight decrease in brightness is due to the hair yellowing over time. In fact, the saturation in the yellow direction increases slightly, indicating that the hair is slightly yellower. However, numerical data confirms that when a purple shampoo treatment is performed after decolorization treatment using a bleaching agent and boost treatment, the decolorization state is maintained even after two months have passed.

As explained above, as a result of color measurement using the L*a*b* color system, the hair color in hair color processing is different from the color visually observed and the color based on the L*a*b* color system. It turned out that they almost matched. In other words, it was possible to identify changes in hair color during hair color treatment using objective numerical data. As a result, "the hair after bleaching with a bleaching agent is further bleached by the color treatment method of the present disclosure, and the period during which the state after further bleaching is maintained is the period during which the state after bleaching with a bleaching agent is maintained. The above-mentioned example proves that the length of the test time is longer than that of the previous example, and is supported by numerical data.

(Other embodiments)
In any one of Embodiments 1 to 3, the color processing method of the embodiment may be applied to hair other than human hair and hair of animals other than humans.

From the above description, many improvements and other embodiments will be apparent to those skilled in the art. Accordingly, the above description should be construed as illustrative only.

The hair color treatment method of the present disclosure is useful as a hair color treatment method that can prolong the state after bleaching.

Claims (4)

A bleaching treatment that bleaches the hair using a bleaching agent;
a first washing process of washing the bleached hair with water;
After the first water washing treatment, the hair bleached by the bleaching treatment is further bleached and the state after further bleaching is maintained; the period during which the state after bleaching by the bleaching agent is maintained. Boost treatment that applies a boost agent to lengthen the length compared to the
A hair color treatment method comprising: a second washing process of washing the boost-treated hair with water. The hair color treatment method according to claim 1, wherein the boost agent is a composition whose producer and/or seller is Shiseido Co., Ltd. and whose product name is Creator (registered trademark) T72 first agent. 2. The hair color treatment method according to claim 1, further comprising a whitening treatment of whitening the hair washed by the second water washing treatment with a purple shampoo. The method for coloring hair according to claim 1, further comprising a coloring process for coloring the hair washed by the second water washing process to a color other than white.

Images