JP2015117186A - Treatment agent for hair deformation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment agent for hair deformation that prevents a decrease in hair deformation efficiency caused by setting of a low pH of the treatment agent for hair deformation applied to the hair.SOLUTION: A treatment agent for hair deformation comprises a first agent comprising a reductant with a pH of less than 7.0, an intermediate treatment agent having a higher pH than the first agent, with the pH of 10.5 or less, and a second agent comprising an oxidizing agent.

Description

  The present invention relates to a hair deformation treating agent for straightening hair or deforming a hair shape into a wave shape.

  Conventionally, as a hair deformation treatment such as permanent wave treatment and curly hair straightening treatment, the first agent containing a reducing agent is used to reduce the cystine bond in the hair to make the hair into a desired shape, and then an oxidizing agent. The process which fixes the shape using the 2nd agent mix | blended with is known. As the first agent in this treatment, many agents whose pH is set to be alkaline are used (for example, see Patent Document 1).

  The reason why the pH of the first agent is set to be alkaline as described above is to increase the reducing power of the reducing agent, and the reducing power tends to increase as the pH increases. This tendency also means that the degree of hair deformation, which is the main purpose of the hair deformation treatment, can be increased. On the other hand, it tends to be accompanied by excessive reduction that causes hair damage. In addition, if the damage to the hair before the hair deformation treatment increases, the reducing agent has a high permeability, and the damage accumulation on the hair due to physical treatment such as brushing or chemical treatment such as hair color treatment increases as it approaches the tip of the hair. If there is an accumulation difference of this damage, the uniformity of the hair shape after the treatment tends to be impaired. If the pH of the first agent is lowered to avoid this, the reducing power of the reducing agent is weakened, so that the deformation efficiency of the hair shape is lowered.

JP 2005-330267 A

  In view of the circumstances described above, an object of the present invention is to provide a hair deformation treatment agent in which a decrease in hair deformation efficiency associated with setting the pH of a hair deformation treatment agent applied to hair to be low is improved.

  As a result of intensive studies by the present inventors, the intermediate treatment agent was used during the use of the first agent containing the reducing agent and the second agent containing the oxidizing agent, and the pH of the intermediate treatment agent was adjusted. It has been found that if the pH of the first agent is set higher than the pH of the first agent, the deformation efficiency of the hair increases as the pH of the first agent is lowered, and the present invention has been completed.

  That is, the hair deformation treatment agent according to the present invention comprises a first agent having a pH of less than 7.0 in which a reducing agent is blended, and an intermediate treatment having a pH higher than that of the first agent and a pH of 10.5 or less. And a second agent in which an oxidizing agent is blended. When the pH of the first agent in the hair deformation treatment is lower than 10.5, the deformation efficiency of the hair tends to be lowered. However, the pH of the intermediate treatment agent used during the use of the first agent and the second agent is reduced. If the pH of the first agent is lowered by setting it higher than one agent, the deformation efficiency tends to improve. Moreover, according to the hair deformation treating agent of the present invention, when deforming damaged hair, the uniformity of the deformation becomes good.

  The pH of the first agent in the present invention is preferably less than 6.5. Within this pH range, the deformation efficiency of the hair is excellent.

  Examples of the reducing agent blended in the first agent of the present invention include thioglycolic acid, thioglycolate, cysteine, cysteine salt, acetylcysteine, cysteamine, cysteamine salt, glyceryl thioglycolate, thiolactic acid, thiolactate, And one or more selected from butyrolactone thiol.

  The pH of the intermediate treatment agent in the present invention is preferably 7.5 or more. When the pH of the first agent is lowered, contrary to the tendency that the deformation efficiency of the hair is increased, with the intermediate treatment agent, the deformation efficiency tends to be increased when the pH is increased.

  The pH of the intermediate treatment agent in the present invention is preferably 10.0 or less. By setting it as this pH range, swelling of hair can be suppressed and suppression of the component outflow from the inside of hair can be expected.

  The intermediate treatment agent preferably contains a polyhydric alcohol. The blending of the polyhydric alcohol with the intermediate treatment agent is good for improving the hair deformation efficiency.

  Further, the present invention includes a first agent containing a reducing agent, an intermediate treatment agent having a pH higher than that of the first agent and 10.5 or less, and a second agent containing an oxidizing agent. A first agent of a hair deformation treatment agent having a pH of less than 7.0.

  The present invention also provides an intermediate treatment for a hair deformation treatment agent comprising a first agent having a pH of less than 7.0 formulated with a reducing agent, an intermediate treatment agent, and a second agent incorporated with an oxidizing agent. An intermediate treatment agent for a hair deformation treatment agent, wherein the pH is higher than that of the first agent and 10.5 or less.

  According to the treatment agent for deforming hair according to the present invention, by setting the pH until the use of the second agent containing the oxidizing agent to 10.5 or less, the pH is easily accompanied by excessive reduction of the hair. A known first agent is not used. Moreover, the fall of the hair deformation efficiency by the said pH setting can be improved by making pH of a 1st agent less than 7.0 and making pH of an intermediate treatment agent higher than a 1st agent.

It is a graph showing the set rate which carried out the hair deformation process by Example 1 and Comparative Examples 1a-1b. It is a graph showing the set rate which carried out the hair deformation process by Example 2a-2b. It is the photograph which image | photographed the wet hair | bristle bundle after the hair deformation process by Example 3a-3c. It is the photograph which image | photographed the dry hair | bristle bundle after the hair deformation process by Example 3a-3c. It is the photograph which image | photographed the wet hair | bristle bundle after the hair deformation process by Example 4a-4b. It is the photograph which image | photographed the wet hair | bristle bundle after the hair deformation process by Example 5 and a reference example.

Based on an embodiment of the present invention, the present invention will be described below.
The hair deformation treatment agent of this embodiment includes a first agent containing a reducing agent, an intermediate treatment agent, and a second agent containing an oxidizing agent.

(First agent)
The first agent of the present embodiment has a predetermined pH value in which the reducing agent is blended in water (a typical example of the first agent of the present embodiment is that the blending amount of water is 80% by mass or more. Stuff.) Moreover, what was suitably selected from the well-known raw material for 1st agents is arbitrarily mix | blended with the 1st agent of this embodiment.

  The reducing agent blended in the first agent of the present embodiment is a known reducing agent having a thiol group, such as thioglycolic acid, thioglycolate (such as ammonium thioglycolate, monoethanolamine thioglycolate), Cysteine (L-cysteine, DL-cysteine, etc.), cysteine salt (hydrochloric acid L-cysteine, hydrochloric acid DL-cysteine, etc.), acetylcysteine (N-acetyl-L-cysteine, etc.), cysteamine, cysteamine salt (cysteamine hydrochloride), Examples include glyceryl thioglycolate, thiolactic acid, thiolactate, and butyrolactone thiol. The blending amount of the reducing agent in the first agent of this embodiment may be set as appropriate, and is, for example, 2% by mass or more and 15% by mass or less.

  The pH of the first agent of the present embodiment is less than 7.0, preferably less than 6.5, preferably less than 5.5, more preferably less than 5.0, and even more preferably less than 4.5. By making the pH of the first agent less than 7.0, the deformation efficiency of the hair is increased. On the other hand, the lower limit of the pH of the first agent is not particularly limited, but is, for example, 2.0.

  When set to the above pH range, an organic acid such as glycolic acid, lactic acid, glyceric acid, gluconic acid, malic acid, tartaric acid, citric acid, succinic acid, glutamic acid, aspartic acid; organic acid salt; hydrochloric acid, One or more selected from inorganic acids such as sulfuric acid, nitric acid and phosphoric acid; and inorganic acid salts may be added to the first agent of the present embodiment.

  What was suitably selected from the well-known raw material for 1st agents is arbitrarily mix | blended with the 1st agent of this embodiment as above-mentioned. These optional ingredients include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, polymer compounds, silicones, hydrocarbons, waxes, higher alcohols, polyhydric alcohols, fatty acids, fats and oils , Ester oils, proteins, amino acids, chelating agents, anti-inflammatory agents, preservatives, perfumes and the like.

  The dosage form at the time of use of the 1st agent of this embodiment is not specifically limited, For example, liquid form, cream form, and foam form (foam form) are mentioned.

(Intermediate treatment agent)
The intermediate treatment agent of the present embodiment has a set pH range (typical as the intermediate treatment agent of the present embodiment has a water content of 80% by mass or more). In the hair deformation treatment, an intermediate treatment agent is applied to the hair between the application of the first agent to the hair and the application of the second agent to the hair.

  The pH of the intermediate treatment agent is 10.5 or less, preferably 10.0 or less, and preferably 9.5 or less in order to avoid the possibility of excessive reduction due to hair swelling.

  Further, the pH of the intermediate treatment agent of the present embodiment is set higher than the pH of the first agent of the present embodiment, the pH is preferably 7.0 or higher, preferably 7.5 or higher, more preferably 8.0 or higher. Preferably, 8.5 or more is further preferable, and 9.0 or more is even more preferable. By setting the pH to 7.0 or higher, the deformation efficiency of the hair is increased.

  When setting the second agent of this embodiment in the above pH range, ammonia, amino alcohol (monoethanolamine, triethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol, 2 -Amino-2-methyl-1,3-propanediol, etc.), basic amino acids (eg, arginine), morpholine, carbonates (eg, ammonium carbonate, ammonium bicarbonate, sodium carbonate, sodium bicarbonate), phosphates (phosphorus) One or more alkali agents selected from ammonium monohydrogen phosphate, sodium monohydrogen phosphate, and the like, and caustic alkalis (potassium hydroxide, sodium hydroxide) and the like may be blended.

  In the intermediate treatment agent of the present embodiment, a material appropriately selected from known raw materials for the first agent and raw materials for the second agent is arbitrarily blended. These optional ingredients include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, polymer compounds, silicones, hydrocarbons, waxes, higher alcohols, polyhydric alcohols, fatty acids, fats and oils , Ester oils, proteins, amino acids, chelating agents, anti-inflammatory agents, preservatives, perfumes and the like.

  If polyhydric alcohol is mix | blended with the intermediate processing agent of this embodiment, the deformation efficiency of hair will increase. As a polyhydric alcohol, it is good in it being 1 type, or 2 or more types chosen from ethylene glycol, propylene glycol, glycerol, and 1, 3- butylene glycol, for example. The blending amount of the polyhydric alcohol in the intermediate treatment agent of the present embodiment is, for example, 5% by mass or more and 15% by mass or less.

  The dosage form at the time of use of the intermediate treatment agent of the present embodiment is not particularly limited, and examples thereof include liquid, cream, and foam (foam).

(Second agent)
The second agent of the present embodiment has a predetermined pH value in which an oxidizing agent is blended in water (a typical example of the second agent of the present embodiment is that the blending amount of water is 80% by mass or more. Stuff.) Moreover, what was suitably selected from the well-known raw material for 2nd agents is arbitrarily mix | blended with the 2nd agent of this embodiment.

  The oxidizing agent blended in the second agent of the present embodiment is, for example, bromate (sodium bromate, potassium bromate, etc.) or hydrogen peroxide, like the known second agent for permanents.

  When the bromate is blended, the pH of the second agent of the present embodiment is, for example, 5.0 or more and 7.5 or less. The pH of the second agent when hydrogen peroxide is blended is, for example, 2.5 or more and 3.5 or less.

  As described above, the second agent of the present embodiment is arbitrarily blended with materials appropriately selected from known second agent raw materials. Examples of the raw material to be arbitrarily blended include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, polymer compounds, silicones, hydrocarbons, waxes, higher alcohols, polyhydric alcohols, fatty acids. Oils, fats, ester oils, proteins, amino acids, chelating agents, anti-inflammatory agents, preservatives, and perfumes.

  The dosage form at the time of use of the 2nd agent of this embodiment is not specifically limited, For example, liquid form, cream form, and foam form (foam form) are mentioned.

(how to use)
The hair deformation treating agent of the present embodiment is a concept including a permanent wave agent and a hair straightening agent. The permanent wave agent corresponding to the hair deformation treatment agent of the present embodiment includes a cold permanent wave agent that imparts waves to the hair at room temperature, and a warm permanent wave agent that imparts waves to the hair under heating. Agents. As a curly hair straightening agent corresponding to the hair deformation treatment agent of this embodiment, a cold hair straightening agent that straightens and straightens curly hair at room temperature, straightens curly hair under heating. These include a warming-type curly hair straightening agent that corrects, a warming-type curly hair straightening agent that uses a high-temperature hair-styling iron, and the like.

  The 1st agent of this embodiment can be used by the method similar to a well-known 1st agent. Heating the hair coated with the first agent is good for improving the deformation efficiency of the hair. After the treatment with the first agent, the hair may be washed with water before applying the intermediate treatment agent to the hair.

  The intermediate treatment agent of this embodiment is used by being applied to hair. Heating the hair coated with the intermediate treatment agent is good for improving the deformation efficiency of the hair. After the treatment with the intermediate treatment agent, the hair may be washed with water before applying the second agent to the hair.

  The 2nd agent of this embodiment can be used by the method similar to a well-known 2nd agent. Applying heat to the hair coated with the second agent is good for improving the deformation efficiency of the hair. After the treatment with the second agent, the hair may be washed with water.

  EXAMPLES Hereinafter, although this invention is explained in full detail based on an Example, this invention is not interpreted limitedly based on description of this Example.

(Example 1, Comparative Examples 1a to 1b)
The hair deformation treatment agents of Example 1 and Comparative Examples 1a to 1b in which the pH of the first agent and the intermediate treatment agent are as shown in Table 1 below were produced, and the hair deformation treatment was performed. Details are as follows.

Example 1, the first agent of Comparative Examples 1a-1b 4% by mass of ammonium thioglycolate, 1% by mass of ammonium dihydrogen phosphate, an aqueous solution prepared by adding phosphoric acid and adjusting the pH to 4.5, It was set as the 1st agent of Example 1 and Comparative Examples 1a-1b.

Example 1 and intermediate treatment agent of Comparative Examples 1a to 1b The intermediate treatment agent of Comparative Example 1a having a pH of 2.0, the intermediate treatment agent of Comparative Example 1b having a pH of 3.0, and the pH of about 1 of Example 1. An intermediate treatment agent was prepared. In Comparative Examples 1a to 1b, an aqueous solution prepared by adding 1.0% by mass of ammonium dihydrogen phosphate and adjusting the pH with phosphoric acid was used as an intermediate treatment agent. In Example 1, water was used as an intermediate treatment agent as it was.

Second agent of Example 1 and Comparative Examples 1a to 1b 8% by weight of sodium bromate and 1.0% by weight of sodium monohydrogen phosphate were mixed, and an aqueous solution adjusted to pH 6.5 by adding phosphoric acid was carried out. It was set as the 2nd agent of Example 1 and Comparative Examples 1a-1b.

Hair deformation treatment of Example 1 and Comparative Examples 1a to 1b A hair bundle to be treated in the hair deformation treatment was prepared as follows. Decolorization treatment was performed on 50 or 2 g hair bundles of 20 cm Japanese hair. In the decolorization treatment, an alkaline aqueous solution (25% by mass of ammonia water 9% by mass, ammonium hydrogen carbonate 2% by mass and potassium hydroxide 0.5% by mass): hydrogen peroxide concentration 6% = 1: 2 The hair bundle was immersed in a decolorization solution mixed at a mass ratio of 60 minutes and then washed with water. And what was washed using shampoo was prepared as a treatment target hair bundle.

  The hair deformation treatment was performed as follows. After applying 2 ml of the first agent to a hair bundle wound around a rod having a diameter of 12 mm, the hair bundle left in a constant temperature bath at a temperature setting of 43 ° C. for 15 minutes was washed with water. Next, 2 ml of the intermediate treatment agent was applied to the hair bundle, and then the hair bundle left for 10 minutes in a constant temperature bath at a temperature setting of 43 ° C. was washed with water. Thereafter, the process from application of 2 ml of the second agent to the hair bundle and standing for 5 minutes was repeated twice, and the hair bundle was washed with water.

Calculation of the set rate The set in a bending set according to Wortmann's report (Wortmann F. -J., Kure N., J. Soc. Cosmet. Chem., 41, 123 (1990)) The rate (hair bundle diameter when floated on purified water ÷ rod diameter × 100) was calculated.

  FIG. 1 is a graph showing the result of the calculated set rate. In FIG. 1, it can be confirmed that as the pH of the intermediate treatment agent increases, the set rate also increases. In addition, the vertical axis | shaft in the graph of FIG. 1 means the linear length of an upper end and a lower end in the state which fixed the upper end of the hair | bristle bundle after performing a hair deformation process.

(Examples 2a to 2b)
The hair deformation treatment agents of Examples 2a to 2b were produced and subjected to hair deformation treatment. Details are as follows.

First agent of Examples 2a to 2b As in Example 1, 4% by mass of ammonium thioglycolate and 1% by mass of ammonium dihydrogen phosphate were mixed, and phosphoric acid was added to adjust the pH to 4.5. Was used as the first agent of Examples 2a to 2b.

Intermediate treatment agent of Examples 2a to 2b As in Example 1, water was used as it was as an intermediate treatment agent of Example 2a. In Example 2b, a 10% by mass aqueous solution of glycerin was used as an intermediate treatment agent (in the treatment agent, pH adjustment using phosphoric acid or the like was not performed).

Second Agent of Examples 2a to 2b As in Example 1, an aqueous solution with a pH of 6.5 containing 8% by mass of sodium bromate was used as the second agent of Examples 2a to 2b.

Hair deformation treatment The hair bundle prepared in the same manner as in Example 1 was treated, and hair deformation treatment and the set rate were calculated in the same manner as in Example 1.

  FIG. 2 is a graph showing the result of the set rate calculated above. In FIG. 2, it can be confirmed that glycerin, which is a polyhydric alcohol, is blended and the set rate is increased.

(Examples 3a to 3c)
The hair deformation treatment agents of Examples 3a to 3c in which the pH of the first agent and the intermediate treatment agent are as shown in Table 2 below were produced, and the hair deformation treatment was performed. Details are as follows.

First Agent of Examples 3a-3c First Agent of Example 3a with pH 2.0, First Agent of Example 3b with pH 4.0, First Agent of Example 3c with pH 6.0 Was prepared. These 1st agents are the aqueous solution which mix | blended 4 mass% of ammonium thioglycolate and 2 mass% of ammonium dihydrogen phosphate, mix | blended phosphoric acid, and adjusted pH.

Examples 3a to 3c Intermediate Treatment Agent An aqueous solution containing 2.0% by mass of ammonium monohydrogen phosphate and adjusted to pH 9.5 with aqueous ammonia was used as the intermediate treatment agent of Examples 3a to 3c.

Second Agent of Examples 3a to 3c An aqueous solution prepared by blending 8% by mass of sodium bromate and 1.0% by mass of sodium monohydrogen phosphate and adjusting the pH to 6.5 by blending phosphoric acid was used in Examples 3a to 3c. The second agent.

Hair deformation treatment of Examples 3a to 3c A hair bundle to be treated in the hair deformation treatment was prepared as follows. Decolorization treatment was performed on 50 hair bundles of 20 cm Japanese hair having no history of chemical treatment such as hair color treatment. In the decolorization treatment, the hair bundle was immersed in 3% by mass hydrogen peroxide water adjusted to pH 10.4 with ammonia water for 30 minutes and then washed with water. This decolorized hair bundle was prepared as a treatment target hair bundle.

  The hair deformation treatment was performed as follows. A hair bundle wound around a rod having a diameter of 12 mm was immersed in 400 ml of the first agent at room temperature for 10 minutes, and then immersed in 400 ml of water at room temperature for 10 minutes. Next, the hair bundle was immersed in 400 ml of the intermediate treatment agent at room temperature for 10 minutes, and then immersed in 400 ml of water at room temperature for 1 minute. Thereafter, the hair bundle was immersed in 400 ml of the second agent at room temperature for 15 minutes and then immersed in 400 ml of water. The hair bundle after the immersion was removed from the rod, the upper end of the hair bundle which had been drained was fixed, and then naturally dried.

  FIG. 3a is a photograph of a wet hair bundle before natural drying after the hair deformation treatment, and FIG. 3b is a photograph of a hair bundle after natural drying. In FIGS. 3a and 3b, the wave shape becomes clearer as the pH of the first agent becomes lower, and it can be confirmed that the hair deformation efficiency is higher when the pH of the first agent is lowered.

(Examples 4a to 4b)
The hair deformation treatment agents of Examples 4a to 4b in which the pH of the first agent and the intermediate treatment agent are as shown in Table 3 below were produced, and the hair deformation treatment was performed. Details are as follows.

The first agent of Examples 4a to 4b An aqueous solution in which 4% by mass of ammonium thioglycolate and 2% by mass of ammonium dihydrogen phosphate were blended and the pH was adjusted to 4.5 with phosphoric acid One agent was used.

Intermediate treatment agents of Examples 4a to 4b A first agent of Example 4a having a pH of 9.0 and an intermediate treatment agent of Example 4b having a pH of 10.0 were prepared. These intermediate treatment agents are aqueous solutions in which 2.0% by mass of ammonium monohydrogen phosphate is blended and the pH is adjusted by blending phosphoric acid or aqueous ammonia.

Second Agent of Examples 4a to 4b As in Example 3a, an aqueous solution with a pH of 6.5 containing 8% by mass of sodium bromate was used as the second agent of Examples 4a to 4b.

Hair deformation treatment of Examples 4a to 4b In the same manner as in Example 3a, the hair deformation treatment of the decolorized hair bundle was performed.

  FIG. 4 is a photograph of a wet hair bundle after the hair deformation treatment, where the wave shape becomes clearer as the pH of the intermediate treatment increases, and the hair deformation efficiency increases as the pH of the intermediate treatment increases. Can be confirmed. This result has a tendency opposite to the relationship between the pH of the first agent and the hair deformation efficiency confirmed in FIGS. 3a and 3b.

(Example 5, reference example)
The hair deformation treatment agent of Example 5 and Reference Example (reference example does not have an intermediate treatment agent) in which the pH of the first agent and the intermediate treatment agent is as shown in Table 4 below, and the hair deformation treatment is performed. went. Details are as follows.

First Agent of Example 5 and Reference Example A first agent of Example 5 having a pH of 4.5 and a first agent of Reference Example having a pH of 9.0 were prepared. These 1st agents are the aqueous solution which mix | blended 4 mass% of ammonium thioglycolate and 2 mass% of ammonium dihydrogen phosphate, mix | blended phosphoric acid, and adjusted pH.

Intermediate treatment agent of Example 5 An aqueous solution in which 2.0% by mass of ammonium monohydrogen phosphate was blended and the pH was adjusted to 9.5 with aqueous ammonia was used as the intermediate treatment agent of Example 5.

Second Agent of Example 5 and Reference Example As in Example 3a, an aqueous solution with a pH of 6.5 containing 8% by mass of sodium bromate was used as the second agent of Example 5 and Reference Example.

Hair deformation treatment of Example 5 In the hair deformation treatment, the hair deformation treatment of the hair bundle was performed in the same manner as in Example 3a, except that three types of hair bundles were treated. The hair bundle used here is a hair bundle that has not been subjected to the decoloring process, a hair bundle that has been subjected to the decoloring process in Example 3a once, and a hair bundle that has been subjected to the same decoloring process three times.

Hair deformation treatment of the reference example The hair bundle to be treated was the same as the hair deformation treatment of Example 5, the hair bundle that was not subjected to the decolorization treatment, the hair bundle that was subjected to the decolorization treatment once, and the hair removal treatment that was performed three times. A hair bundle was used. And the hair deformation process of the reference example was performed by the method which abbreviate | omitted the process from the use of the intermediate treatment agent in the hair deformation process of Example 5 to the use before the 2nd agent.

  FIG. 5 is a photograph of a wet hair bundle after the hair deformation treatment. In this figure, the reference example is different from Example 5 in the hair deformation efficiency depending on the number of decolorizations of the hair bundle. From this, according to the hair deformation process of Example 5, it can be confirmed that the uniformity of deformation is high even if the hair bundle is damaged.

Claims (8)

  A first agent having a pH of less than 7.0 formulated with a reducing agent, an intermediate treatment agent having a pH higher than that of the first agent and having a pH of 10.5 or less, and a second agent formulated with an oxidizing agent; A treatment agent for hair deformation, comprising:   The hair deformation treatment agent according to claim 1, wherein the pH of the first agent is less than 6.5.   In the first agent, one or two selected from thioglycolic acid, thioglycolate, cysteine, cysteine salt, acetylcysteine, cysteamine, cysteamine salt, glyceryl thioglycolate, thiolactic acid, thiolactate, and butyrolactone thiol The treatment agent for hair deformation according to claim 1 or 2, wherein at least a seed is blended as a reducing agent.   The hair deformation treatment agent according to any one of claims 1 to 3, wherein the intermediate treatment agent has a pH of 7.5 or more.   The pH of the said intermediate treatment agent is 10.0 or less, The treatment agent for hair deformation of any one of Claims 1-4.   The hair deformation treatment agent according to any one of claims 1 to 5, wherein the intermediate treatment agent contains a polyhydric alcohol. A hair deformation treatment agent comprising: a first agent formulated with a reducing agent; an intermediate treatment agent having a pH higher than that of the first agent and 10.5 or less; and a second agent incorporated with an oxidizing agent. The first agent,
A first agent of a hair deformation treatment agent, wherein the pH is less than 7.0. An intermediate treatment agent for a hair deformation treatment agent comprising a first agent having a pH of less than 7.0 formulated with a reducing agent, an intermediate treatment agent, and a second agent incorporated with an oxidizing agent,
An intermediate treatment agent for a hair deformation treatment agent, wherein the pH is higher than that of the first agent and 10.5 or less.