KR102077814B1 - nonoxidative hair dye composition, nonoxidative hair dye containing thereof and hair dye method using the same - Google Patents

Abstract

The present invention relates to a non-oxidizing hair dye composition, a non-oxidizing hair dye containing the same, and a hair dyeing method using the same. More specifically, the dyeing power is excellent, as well as excellent color persistence due to less water drainage after dyeing. A composition, a non-oxidizing hair dye comprising the same, and a hair dyeing method using the same.

Description

Non-oxidative hair dye composition, non-oxidative hair dye comprising the same, and hair dye method using same {nonoxidative hair dye composition, nonoxidative hair dye containing according to and hair dye method using the same}

The present invention relates to a non-oxidizing hair dye composition, a non-oxidizing hair dye containing the same, and a hair dyeing method using the same. More specifically, the dyeing power is excellent, as well as excellent color persistence due to less water drainage after dyeing. A composition, a non-oxidizing hair dye comprising the same, and a hair dyeing method using the same.

In recent years, with the development of modern medicine, the longevity of human life and the improvement of quality of life have led to an increase in the importance of healthy life and the desire for beauty of appearance. This desire to look younger and more beautiful than age is manifested in the interest in hair dyeing, which can be expected to have a great effect at a low cost. The most commonly used dyes for hair dyeing include p-phenylenediamine (PPD), m-aminophenol (m-aminophenol), o-aminophenol (o-aminophenol) and resorcinol. In particular, PPD can cause skin rash, eczema and scalp inflammation, causing allergic contact dermatitis, severe swelling of the face and painful bruises, itching, eye pain, vision damage, scalp disease and hair loss. To cause side effects. In addition, the ammonia solution of pH 9-10, which is used for the penetration of chemicals into the cuticle layer in the dyeing process, can cause hair damage although it can achieve the desired color. Hair damage, such as hair splitting or breaking, is impossible to recover and is removed by cutting.

Natural dyes have difficulty in pursuing various color changes and have low fastness and reproducibility. However, natural dyes have emerged as an alternative to hair dyes due to their natural color, non-toxicity to the human body and less environmental pollutants than synthetic dyes. In recent studies of natural dyes, anthocyanin pigments, which are multicolored dyes, are not only used as various mordants, but can be applied to hair dyeing by selecting a morbidity condition and a morbidity method to realize various colors with a single pigment.

In general, hair dyes can be classified into permanent hair dyes (oxidative hair dyes), semi-permanent hair dyes (non-oxidizing hair dyes) and temporary colorants according to the durability of the colored color and the characteristics of the composition.

In the case of oxidizing hair dyes, low molecular weight oxidizing dyes cause oxidative polymerization reactions in the hair to form pigments, which are various types of hair dyes because they can obtain various colors and have excellent hair dyeing characteristics. Such an oxidative hair dye composition contains at least one dye precursor and at least one coupler which form a dye by being oxidized by an oxidizing agent, and the oxidizing dye hair dye composition comprises an oxidizing agent consisting of a diluted hydrogen peroxide solution or the like immediately before being applied to the hair. Use by mixing. The purpose of the hair dye is to dye the hair as completely as possible and to maintain the hair dye effect for a long time.

On the other hand, non-oxidative hair dyes are useful hair dyes to provide natural colors close to the primary color to the hair, and the hair damage is relatively small, and can be easily performed at the same time as the perm, the utilization thereof is gradually expanding. Unlike non-oxidative hair dyes, such non-oxidative hair dyes do not use an oxidation reaction, but dye the hair through a mortar reaction of a metal salt and a natural dye.

However, commercially available non-oxidizing hair dyes have a low dyeing effect, and have a disadvantage in that discoloration occurs easily due to water bleeding caused by repeated shampooing.

Korean Registered Patent No. 10-1108783 (Publication date: October 26, 2010)

The present invention has been made in view of the above, and has a good initial hair dye and cumulative hair dye, as well as non-oxidative hair dye composition having low side effects such as hair droop and skin irritation, and non-oxidizing hair dye comprising the same And to provide a hair dyeing method using the same.

In order to solve the above problems, the non-oxidizing hair dye composition of the present invention may include a mordant, a new tree extract and a buffer solution.

As a preferred embodiment of the present invention, the mordant and the new tree extract may include 1: 47 to 72 weight ratio

In one preferred embodiment of the present invention, the buffer solution may have a pH of 4 ~ 6.2.

In a preferred embodiment of the present invention, the buffer solution may include one or more of sodium acetate, citric acid and hydrochloric acid.

In a preferred embodiment of the present invention, the mordant is ferrous sulfate (FeSO ₄ ), magnesium sulfate (MgSO ₄ ), manganese sulfate (MnSO ₄ ), copper sulfate (CuSO ₄ ), acetic acid (CH ₃ COOH), cobalt nitrate (Co (NO _{3) 2),} it may include one or more of calcium carbonate (CaCO ₃₎ and sodium carbonate (Na ₂ CO _3).

As a preferred embodiment of the present invention, the sour tree extract of the present invention may be a hydrothermal extract of a sour tree leaf and a sour tree branch.

As a preferred embodiment of the present invention, the sour tree extract of the present invention may be an alcohol extract of the sour tree leaf and the sour tree branch.

Meanwhile, the non-oxidizing hair dye of the present invention includes the aforementioned non-oxidizing hair dye composition, and may have a pH of 3 to 6.7.

Furthermore, the hair dyeing method using the non-oxidizing hair dye of the present invention may include a first step of preparing the non-oxidizing hair dye mentioned above and a second step of dyeing the hair using the non-oxidizing hair dye.

As a preferred embodiment of the present invention, the second step may be performed by repeating one to four times.

On the other hand, the non-oxidizing hair dye of the present invention may be 23.6 ~ 35.6 color development power of the hair measured by the following equation 1.

Equation 1

Color development of hair = A-B

In Equation 1, A is a ΔE value measured using a colorimeter after dyeing the hair once with the non-oxidizing hair dye, and B is a color difference after dyeing the hair once with a solution containing a mordant and a buffer solution. ΔE values measured using a system.

In addition, the non-oxidizing hair dye of the present invention may be 29.2 ~ 44.0 color development power of the hair measured by the following equation 2.

[Equation 2]

Color development of hair = A '-B'

In Equation 2, A 'is a ΔE value measured using a color difference meter after dyeing the hair twice with the non-oxidizing hair dye, and B' is a dye dyeing the hair twice with a solution containing a mordant and a buffer solution. This is the ΔE value measured using the back color difference meter.

In addition, the non-oxidizing hair dye of the present invention may have a color developing power of 30.8 to 46.4 as measured by the following Equation 3.

[Equation 3]

Color development of hair = A "-B"

In Equation 3, A ″ is a ΔE value measured using a colorimeter after dyeing the hair 3 times with the non-oxidizing hair dye, and B ″ is a dye containing 3 times the hair with a solution containing a mordant and a buffer solution. This is the ΔE value measured using the back color difference meter.

In addition, the non-oxidizing hair dye of the present invention may have a color fastness of 1.2 to 1.8 measured by the following Equation 4.

[Equation 4]

Color fastness of hair = C-D

In Equation 4, C is added to sodium dodecylsulfate hair repeatedly dyed by the non-oxidizing hair dye, and left at room temperature for 30 minutes after vortexing, and then using a color difference meter. ΔE value measured by D, and the hair dyed three times by the non-oxidizing hair dye was added to sodium dodecylsulfate, and left at room temperature for 30 minutes after vortexing, and then using a color difference meter. Is the ΔE value measured.

The non-oxidizing hair dye composition of the present invention, the non-oxidizing hair dye containing the same, and the hair dyeing method using the same have excellent initial hair dye as well as cumulative hair dye.

In addition, the non-oxidizing hair dye composition of the present invention, the non-oxidizing hair dye comprising the same, and the hair dyeing method using the same have less water drainage after dyeing, and thus have excellent color persistence and fewer side effects such as skin irritation.

1 is a graph showing the ΔE value measured by the color development of the hair by Experimental Example 1 using the non-oxidizing hair dye prepared in Example 1 and Comparative Examples 1 to 3.
Figure 2 is a graph showing the ΔE value measured by the color development of the hair by Experimental Example 1 using the non-oxidizing hair dye prepared in Examples 2 and Comparative Examples 4-6.
3 is a diagram showing the color of the hair dyed by Experimental Example 1 using the non-oxidizing hair dye prepared in Example 1 and Comparative Examples 1 to 3.
Figure 4 is a picture showing the color of the hair dyed by Experimental Example 1 using the non-oxidizing hair dye prepared in Example 2 and Comparative Examples 4-6.
FIG. 5 is a graph showing the ΔE value of the hair fastness (dripping) of the third dyed hair using Experimental Example 2 using the non-oxidizing hair dye prepared in Examples 1 and 3.
6 is a graph showing the ΔE value of the hair fastness (dripping) of the third dyed hair using Experimental Example 2 using the non-oxidizing hair dye prepared in Examples 2 and Comparative Examples 4 to 6. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification.

The non-oxidizing hair dye composition of the present invention includes a mordant, a verdure extract and a buffer solution.

First, the mordant is a material that serves to bond well to the fiber when not stained with pure dye alone, the mordant of the present invention is ferrous sulfate (FeSO ₄ ), magnesium sulfate (MgSO ₄ ), manganese sulfate (MnSO ₄ ) , Copper sulfate (CuSO ₄ ), acetic acid (CH ₃ COOH), cobalt nitrate (Co (NO ₃ ) ₂ ), calcium carbonate (CaCO ₃ ) and sodium carbonate (Na ₂ CO ₃ ), and may include Preferably ferrous sulfate (FeSO ₄ ).

Next, the god tree extract of the present invention is an extract extracted from the god tree may be derived from one or more selected from the tree leaves, god tree branches and tree bark, preferably from the tree leaves and god tree branches. At this time, the cypress leaf, the cypress branch or the bark may be ground to a suitable size in a dried state.

On the other hand, the Cinnabar extract of the present invention may be an extract extracted with an alcohol solvent, a water solvent, an acetone solvent or a chloroform solvent, preferably an alcohol extract extracted with an alcohol solvent or 80 ~ 120 ℃, preferably 90 ~ 110 ℃ It may be a hydrothermal extract extracted from hot water.

In addition, the alcohol solvent may include any one alcohol selected from the group consisting of C1 ~ C4 lower alcohol, preferably may include ethanol. In addition, the alcohol solvent is meant to include alcohol and may be composed of 100% alcohol or mixed with other solvents. In this case, water, ethyl acetate, chloroform, hexane and the like can be preferably used as other solvents.

On the other hand, the mordant and the new tree extract included in the non-oxidizing hair dye composition of the present invention may include 1: 47 to 72 weight ratio, preferably 1: 53 to 66 weight ratio, more preferably 1: 56 to 63 parts by weight.

Next, a buffer solution (buffer solution) is included in the non-oxidizing hair dye composition of the present invention, it can serve as a solvent as well as pH adjustment.

Specifically, the buffer solution may have a pH of 4 to 6.2, preferably pH of 4.5 to 5.7, more preferably pH of 4.8 to 5.4.

On the other hand, the non-oxidizing hair dye of the present invention includes the aforementioned non-oxidizing hair dye composition, pH of 3 ~ 6.7, preferably pH of 4 ~ 6.2, more preferably pH of 4.8 ~ 5.4.

Furthermore, the hair dyeing method using the non-oxidizing hair dye of the present invention may include a first step of preparing the aforementioned non-oxidizing hair dye and a second step of dyeing the hair using the prepared non-oxidizing hair dye.

In addition, the second step may be repeated once to four times, preferably two to three times, more preferably three times.

In addition, the non-oxidizing hair dye of the present invention may be 23.6 to 35.6, preferably 26.6 to 32.6, more preferably 28.1 to 31.1, the color generation force of the hair measured by the following equation (1).

Equation 1

Color development of hair = A-B

In Equation 1, A is a ΔE value measured using a color difference meter after primary dyeing of the hair with the non-oxidizing hair dye of the present invention, and B is a primary dyeing of the hair with a solution containing a mordant and a buffer solution. This is the ΔE value measured using the back color difference meter.

In this case, the ΔE value is a value calculated by using the color difference meter, L * (brightness), a * (redness), and b * (yellowness), and calculated by Equation 1 below.

[Equation 1]

ΔE = [(100-L *) ² + (a *) ² + (b *) ² ] ^1/2

In addition, the non-oxidizing hair dye of the present invention may be 29.2 ~ 44.0, preferably 32.9 ~ 40.3, more preferably 34.7 ~ 38.5, the color generating force of the hair measured by the following equation 2.

[Equation 2]

Color development of hair = A '-B'

In Equation 2, A 'is a ΔE value measured using a color difference meter after dyeing the hair twice with the non-oxidizing hair dye of the present invention, and B' is a solution containing a mordant and a buffer solution twice. ΔE values measured using a colorimeter after staining.

In this case, the ΔE value is a value calculated by using the color difference meter, L * (brightness), a * (redness), and b * (yellowness), and calculated by Equation 1 below.

[Equation 1]

ΔE = [(100-L *) ² + (a *) ² + (b *) ² ] ^1/2

In addition, the non-oxidizing hair dye of the present invention may be 30.8 ~ 46.4, preferably 34.7 ~ 42.5, more preferably 36.6 ~ 40.6 color development force of the hair measured by the following equation 3.

[Equation 3]

Color development of hair = A "-B"

In Equation 3, A ″ is a ΔE value measured using a colorimeter after dyeing the hair three times with the non-oxidizing hair dye of the present invention, and B ″ is a solution containing a mordant and a buffer solution three times. ΔE values measured using a colorimeter after staining.

In this case, the ΔE value is a value calculated by using the color difference meter, L * (brightness), a * (redness), and b * (yellowness), and calculated by Equation 1 below.

[Equation 1]

ΔE = [(100-L *) ² + (a *) ² + (b *) ² ] ^1/2

In addition, the non-oxidative hair dye of the present invention may have a hair fastness of 1.2 to 1.8, preferably 1.35 to 1.65, and more preferably 1.42 to 1.58, as measured by Equation 4 below.

[Equation 4]

Color fastness of hair = C-D

In Equation 4, C is added to the sodium dodecylsulfate hair repeatedly dyed by the non-oxidizing hair dye of the present invention, and left at room temperature for 30 minutes after vortexing (color difference meter) ΔE value measured using D, and the hair dyed three times with the non-oxidizing hair dye of the present invention was added to sodium dodecylsulfate, and left at room temperature for 30 minutes after vortexing. ΔE values measured using a color difference meter.

In this case, the ΔE value is a value calculated by using the color difference meter, L * (brightness), a * (redness), and b * (yellowness), and calculated by Equation 1 below.

[Equation 1]

ΔE = [(100-L *) ² + (a *) ² + (b *) ² ] ^1/2

The present invention has been described above with reference to the embodiments, which are merely exemplary and are not intended to limit the embodiments of the present invention, and those skilled in the art to which the embodiments of the present invention belong may have the essential characteristics of the present invention. It will be appreciated that various modifications and applications not illustrated above are possible without departing from the scope of the invention. For example, each component specifically shown in the embodiment of the present invention may be modified. And differences relating to these modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

Preparation Example 1 Preparation of Cinnabar Extract

After grinding 10 kg of the leaves and 10 kg of the new leaves to the appropriate size, 50L of water was added and extracted for 5 hours at a temperature of 100 ℃. Thereafter, the extract was extracted with hot water, filtered with gauze, filtered through a filter paper to remove impurities, and the resultant was concentrated under a reduced pressure with a steam concentrator to obtain 5 L of a new tree extract.

Preparation Example 2 Preparation of Cinnabar Extract

After crushing 10 kg of the leaves and 10 kg of the biloba tree to an appropriate size, ethanol 30L was added and stirred well, soaked at room temperature and extracted three times for 72 hours. Thereafter, the extract extracted with ethanol was concentrated under reduced pressure using a vapor pressure concentrator to obtain 1 L of a cypress extract.

Comparative Preparation Example 1 Preparation of Extract

After crushing 10kg of the fruit of the fruit to a suitable size, 30L of 30% by weight ethanol aqueous solution was added and stirred well, immersed at room temperature and extracted three times each 72 hours. Thereafter, the extract extracted with an aqueous 30% by weight ethanol solution was concentrated under reduced pressure using a steam concentrator at a temperature of 35 ℃ to obtain a concentrate.

The obtained concentrate was extracted by solvent fractionation using ethyl acetate and water. The ethyl acetate layer and the water layer produced by solvent fraction extraction were concentrated under reduced pressure, respectively, to obtain an ethyl acetate fraction and a water fraction.

The obtained water fractions were adsorbed using size chromatography (diaion, HP-20), washed with 4 times the amount of water sufficiently, eluted with ethanol, and concentrated to prepare a light wood extract.

Example 1 Preparation of Non-oxidizing Hair Dye

A non-oxidizing hair dye was prepared by mixing 2.97 g (= 3 ml) of the new tree extract prepared in Preparation Example 1 and 0.05 g of ferrous sulfate (FeSO ₄ ) in ₄ ml of a solution containing 100 mM sodium acetate having a pH of 5.1. .

Example 2 Preparation of Non-oxidizing Hair Dye

A non-oxidizing hair dye was prepared by mixing 2.97 g (= 3 ml) of the Cinnamon extract prepared in Preparation Example 1 and 0.05 g of ferrous sulfate (FeSO ₄ ) in ₄ ml of a solution containing 100 mM Tri-HCl (HCl) having a pH of 8.5. .

Comparative Example 1: Preparation of non-oxidizing hair dye

A non-oxidizing hair dye was prepared by mixing ferrous sulfate (FeSO ₄ ) 0.05g with ₄ ml of a solution containing 100 mM sodium acetate having a pH of 5.1.

Comparative Example 2: Preparation of non-oxidizing hair dye

A non-oxidizing hair dye was prepared by mixing 3 ml of the aqueous solution of the light wood extract prepared in Comparative Preparation Example 1 and 0.05 g of ferrous sulfate (FeSO ₄ ) to ₄ ml of a solution containing 100 mM sodium acetate having a pH of 5.1. The aqueous solution of the light wood extract is a solution in which 0.6 g of the light wood extract is diluted in 40 ml of water.

Comparative Example 3: Preparation of non-oxidizing hair dye

A non-oxidizing hair dye was prepared by mixing 2.97 g (= 3 ml) of the extract of Cinnamon prepared in Preparation Example 1 to 4 ml of a solution containing 100 mM sodium acetate having a pH of 5.1.

Comparative Example 4: Preparation of non-oxidizing hair dye

A non-oxidizing hair dye was prepared by mixing 0.05 g of ferrous sulfate (FeSO ₄ ) in ₄ ml of a solution containing 100 mM Tri-HCl (HCl) having a pH of 8.5.

Comparative Example 5: Preparation of non-oxidizing hair dye

A non-oxidizing hair dye was prepared by mixing 3 ml of the aqueous solution of the light wood extract prepared in Comparative Preparation Example 1 and 0.05 g of ferrous sulfate (FeSO ₄ ) to ₄ ml of a solution containing 100 mM Tri-HCl (HCl) having a pH of 8.5. The aqueous solution of the light wood extract is a solution in which 0.6 g of the light wood extract is diluted in 40 ml of water.

Comparative Example 6: Preparation of non-oxidizing hair dye

A non-oxidizing hair dye was prepared by mixing 2.97 g (= 3 ml) of the Cinnamon extract prepared in Preparation Example 1 to 4 ml of a solution containing 100 mM Tri-HCl (HCl) having a pH of 8.5.

Experimental Example 1 Measurement of Color Color Development of Hair

0.4 g of hair was added to each of the non-oxidative hair dyes prepared in Examples 1 to 2 and Comparative Examples 1 to 6, and after vortexing, left at room temperature for 30 minutes to perform primary hair dyeing.

The hairs subjected to the primary dyeing were washed with tap water, dried with a dryer, and the ΔE values were measured using a colorimeter (JCS-10, CHN Spec), and the results are shown in FIGS. 1 to 4 and Table 1.

Then, the hairs subjected to the primary dyeing were added to the non-oxidative hair dyes prepared in Examples 1 and 2 and Comparative Examples 1 to 6, respectively, and after vortexing, left at room temperature for 30 minutes to give 2 Primary hair staining was performed.

After the hair dye was washed with tap water and dried with a dryer, the ΔE value was measured using a colorimeter (JCS-10, CHN Spec) and the results are shown in FIGS. 1 to 4 and Table 1.

Thereafter, the hairs subjected to the second hair dye were added to the non-oxidative hair dyes prepared in Examples 1 and 2 and Comparative Examples 1 to 6, respectively, and after vortexing, left at room temperature for 30 minutes. Third hair staining was performed.

After washing the hair subjected to the third dyeing with tap water and dried with a dryer, the ΔE value was measured using a colorimeter (JCS-10, CHN Spec) and the results are shown in FIGS. 1 to 4 and Table 1.

At this time, the ΔE values of the hairs subjected to the primary, secondary and tertiary staining are measured using L * (brightness), a * (redness) and b * (yellowness) using a colorimeter, and The value calculated by Equation 1.

[Equation 1]

ΔE = [(100-L *) ² + (a *) ² + (b *) ² ] ^1/2

* () Value is the standard deviation value measured 6 times.

As shown in Table 1, the hair using the non-oxidizing hair dye prepared in Example 1 was the first of the hair using the non-oxidizing hair dye prepared in Example 1 and the hair using the non-oxidizing hair dye prepared in Comparative Examples 1 to 6, It was confirmed that the second and third staining had the best ΔE value.

Experimental Example 2 Measurement of Color Fastness (Water Dripping) of Hair

7 ml of sodium dodecylsulfate (SDS) solution was added to the non-oxidative hair dyes prepared in Examples 1 to 2 and Comparative Examples 1 to 6 through Experimental Example 1, respectively, and the hairs subjected to tertiary dyeing were vortexed ( After vortexing), the mixture was left at room temperature for 30 minutes to perform a first wash of the dyed hair.

After washing the hair after the first wash with tap water and dried with a dryer, the ΔE value was measured using a colorimeter (JCS-10, CHN Spec) and the results are shown in FIGS. 5 to 6 and Table 2.

Thereafter, the hairs subjected to the first washing are added to sodium dodecylsulfate (SDS) solution, and the second washing of the dyed hair is performed by vortexing and left at room temperature for 30 minutes after vortexing. Was performed.

After performing the second wash, the hair was washed with tap water and dried with a dryer, and the ΔE value was measured using a colorimeter (JCS-10, CHN Spec). The results are shown in FIGS. 5 to 6 and Table 2.

Thereafter, the hairs subjected to the second wash were added to sodium dodecylsulfate (SDS) solution, and then vortexed, and left at room temperature for 30 minutes to perform the third wash.

After washing the hair after the third wash with tap water and drying the hair with a dryer, the ΔE value was measured using a colorimeter (JCS-10, CHN Spec), and the results are shown in FIGS. 5 to 6 and Table 2.

In this case, the ΔE values of the hairs subjected to the first, second and third washes are measured by using a colorimeter to measure L * (brightness), a * (redness) and b * (yellowness), and The value calculated by Equation 1.

[Equation 1]

ΔE = [(100-L *) ² + (a *) ² + (b *) ² ] ^1/2

* () Value is the standard deviation value measured 6 times.

As shown in Table 2, the hair dyed with the non-oxidative hair dye prepared in Example 1 was confirmed to have less water drain due to a small difference in ΔE value even after the third wash.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (14)

Ferrous sulfate (FeSO ₄ ), including the hot-spring extract of fever and buffer solution,
The ferrous sulfate and the new hydrothermal extract is included in a weight ratio of 1: 47 to 72,
The buffer solution is a non-oxidizing hair dye composition, characterized in that it comprises sodium acetate (Sodium Acetate) having a pH of 4 ~ 6.2
delete delete delete delete The method of claim 1,
Non-oxidative hair dye composition, characterized in that the hot water extract of the hot-spring extract is a hot-water extract of the leaves and leaves of the new tree.
delete A non-oxidative hair dye comprising the non-oxidative hair dye composition of any one of claims 1 to 6, wherein the pH is 3 to 6.7.
A first step of preparing a non-oxidizing hair dye of claim 8; And
A second step of dyeing the hair using the non-oxidizing hair dye;
Hair dyeing method using a non-oxidizing hair dye, characterized in that it comprises a.
The method of claim 9,
The second step is a hair dye method using a non-oxidizing hair dye, characterized in that it is carried out repeatedly 1 to 4 times.
The method of claim 9,
The non-oxidizing hair dye is a hair coloring method using a non-oxidizing hair dye, characterized in that the color development of the hair measured by the following equation 1 is 23.6 ~ 35.6.
Equation 1
Color development of hair = A-B
In Equation 1, A is a ΔE value measured using a colorimeter after dyeing the hair once with the non-oxidizing hair dye, and B is a color difference after dyeing the hair once with a solution containing a mordant and a buffer solution. ΔE values measured using a system.
The method of claim 9,
The non-oxidizing hair dye is a hair coloring method using a non-oxidizing hair dye, characterized in that the color development of the hair measured by the following equation 2 is 29.2 ~ 44.0.
[Equation 2]
Color development of hair = A '-B'
In Equation 2, A 'is a ΔE value measured using a color difference meter after dyeing the hair twice with the non-oxidizing hair dye, and B' is a dye dyeing the hair twice with a solution containing a mordant and a buffer solution. This is the ΔE value measured using the back color difference meter.
The method of claim 9,
The non-oxidizing hair dye is a hair coloring method using a non-oxidizing hair dye, characterized in that the color development of the hair measured by the following equation 3 is 30.8 ~ 46.4.
[Equation 3]
Color development of hair = A "-B"
In Equation 3, A ″ is a ΔE value measured using a colorimeter after dyeing the hair three times with the non-oxidizing hair dye, and B ″ is a dye containing three times the hair with a solution containing a mordant and a buffer solution. This is the ΔE value measured using the back color difference meter.
The method of claim 9,
The non-oxidative hair dye is a method of hair dyeing using a non-oxidizing hair dye, characterized in that the fastness of the hair measured by the following equation 4.
[Equation 4]
Color fastness of hair = C-D
In Equation 4, C is added to sodium dodecylsulfate hair repeatedly dyed by the non-oxidizing hair dye, and left at room temperature for 30 minutes after vortexing, and then using a color difference meter. ΔE value measured by D, and the hair dyed three times by the non-oxidizing hair dye was added to sodium dodecylsulfate, and left at room temperature for 30 minutes after vortexing, and then using a color difference meter. Is the ΔE value measured.

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