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Method of hair dyeing and hairdye set

A hair dye, hair technology, applied in the field of hair dyeing

Inactive Publication Date: 2004-06-16
ARIMINO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even with the same hair dye, the part of the hair that has already been dyed shows higher brightness compared to the part of new hair, causing a problem that it is impossible to dye the entire hair evenly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Preparation of the first reagent

[0089] According to the formulation proportions shown in Table 1, the first agent for the new hair part and the first agent for the dyed hair part were prepared in the following manner.

[0090] First, put cetyl alcohol, liquid paraffin, polyoxyethylene stearyl ether, stearyl trimethylammonium chloride and polyethylene glycol in a reactor equipped with a stirring device, and heat at 75°C to form a solution. With the stirring of the solution, gradually add the solution obtained by dissolving p-phenylenediamine, p-aminophenol, p-amino-o-cresol and sodium sulfite in pure water at 75°C, then cool to 30°C with stirring, and then add 28wt% ammonia water , to get the first reagent in paste form.

[0091] Preparation of the second reagent

[0092] According to the formula ratio shown in Table 2 and using 35wt% hydrogen peroxide solution, the pasty second reagent with a hydrogen peroxide content of 6% by weight and the paste with a hydrog...

Embodiment 2

[0101] Preparation of the first reagent

[0102] The first agent for the new hair part and the first agent for the dyed hair part were prepared in the same manner as in Example 1 except that the formula ratios were changed to those shown in Table 1.

[0103] Preparation of the second reagent

[0104] According to the formula ratio shown in Table 2 and using 35wt% hydrogen peroxide solution, the pasty second reagent with a hydrogen peroxide content of 6% by weight and the paste with a hydrogen peroxide content of 3% by weight were prepared by conventional methods like the second reagent.

[0105] Hair Coloring and Evaluation

[0106] Hair that was dyed brown about two months ago, the new hair part is the standard Japanese black hair, the black new hair part is about 2 cm long, and the dyed hair part has higher brightness. Stain for a natural-looking shade.

[0107] First, the first agent for the new hair part and the second agent for the new hair part (hydrogen peroxi...

Embodiment 3

[0113] Preparation of the first reagent

[0114] The first agent for the new hair part and the first agent for the dyed hair part were prepared in the same manner as in Example 1 except that the formula ratios were changed to those shown in Table 1.

[0115] Preparation of the second reagent

[0116] According to the formula ratio shown in Table 2 and using 35wt% hydrogen peroxide solution, the pasty second reagent with a hydrogen peroxide content of 6% by weight and the paste with a hydrogen peroxide content of 3% by weight were prepared by conventional methods like the second reagent.

[0117] Hair Coloring and Evaluation

[0118] The hair, in which the new hair part and the already dyed hair part were in the same state as the hair in Example 2, was dyed so as to be dyed in a natural tone.

[0119] First, the first agent for the new hair part and the second agent for the new hair part (hydrogen peroxide content: 6% by weight) were mixed at a mixing ratio of 1:1 by w...

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PUM

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Abstract

The hair-coloring method of the invention is a method comprising coloring hair having virgin hair portions and already-colored hair portions, wherein (A) the virgin hair portions are colored with an oxidative hair-coloring agent (I) comprising an oxidative dye, ammonia and hydrogen peroxide and having an ammonia concentration of 0.2 to 3.0% by weight and a hydrogen peroxide concentration of 2.5 to 5.0% by weight, and (B) the already-colored hair portions are colored with an oxidative hair-coloring agent (II) comprising an oxidative dye, ammonia and hydrogen peroxide and having an ammonia concentration of 0.1 to 1.5% by weight and a hydrogen peroxide concentration of 0.01 to 2.0% by weight. The hair-coloring agent set of the invention is preferably used for the hair-coloring method. According to the invention, hair having virgin hair portions and already-colored hair portions can be colored in uniform color tone over the whole hair.

Description

technical field [0001] The invention relates to a hair dyeing method. More particularly, the present invention relates to a method of uniformly dyeing hair including new hair parts and already dyed hair parts, and a set of hair dyes preferably used in the hair dyeing method. Background technique [0002] Recently, the number of people who dye their hair continuously is increasing. In this case, it is required to dye all the hair with the same color or to change the hair to a different color as the hair grows. [0003] When dyeing to obtain the same color or to change hair to a different color, undyed new hair (hereinafter referred to as "new hair") and dyed hair (hereinafter referred to as "new hair") have to be considered. "hair that has been dyed") at the same time. [0004] For example, in hair dyed with conventional oxidative hair dyes, the melanin is destroyed and the dye is gradually washed off to decolorize the hair in the part of the hair that has been dyed. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61Q5/10A61K8/19A61K8/22
CPCA61K8/22A61K8/19A61Q5/10A61K2800/884A61K8/40
Inventor 八木岡聡町田昌治大郷広靖
Owner ARIMINO
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