Method for bleaching hair

A technology of hair and bleaching solution, which is applied in the field of bleaching. It can solve the problems of affecting the feel and luster, easy breakage, and damage to hair quality, and achieves the effect of excellent bleaching effect, high breaking strength, and small damage

Inactive Publication Date: 2010-05-19
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive emphasis on the bleaching effect will damage the hair quality, affect the feel and luster, and it is easy to break

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Thiourea dioxide, sodium carbonate and sodium bicarbonate are made into aqueous solution, wherein the concentration of thiourea dioxide is 2.5g / L, and the concentration of sodium carbonate and sodium bicarbonate is 5g / L (wherein the weight ratio of sodium carbonate and sodium bicarbonate is 0.8 : 1), put the hair that needs to be treated into the prepared bleaching liquid (bath ratio 1:20), stir evenly and heat up to 55°C, keep warm for 1.5 hours, and then rinse with water to obtain hair with a damage degree of less than 5%. Beige hair.

Embodiment 2

[0019] Thiourea dioxide, sodium carbonate and sodium bicarbonate are made into aqueous solution, wherein the concentration of thiourea dioxide is 3g / L, and the concentration of sodium carbonate and sodium bicarbonate is 7g / L (wherein the weight ratio of sodium carbonate and sodium bicarbonate is 1.2: 1) Put the hair to be treated into the prepared bleach (bath ratio 1:18), stir evenly and heat up to 50°C, keep it warm for 1.2 hours, then rinse with water to get a beige color with a damage degree of less than 5% hair.

Embodiment 3

[0021] Thiourea dioxide, sodium carbonate and sodium bicarbonate are made into aqueous solution, wherein the concentration of thiourea dioxide is 5g / L, and the concentration of sodium carbonate and sodium bicarbonate is 4g / L (wherein the weight ratio of sodium carbonate and sodium bicarbonate is 0.5: 1) Put the hair to be treated into the prepared bleach (bath ratio 1:22), stir evenly and heat up to 48°C, keep it warm for 2 hours, and then rinse with water to get a beige color with a damage degree of less than 5% hair.

[0022] The sodium carbonate and sodium bicarbonate that above each embodiment adopts also can be replaced with other similar alkaline substances.

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PUM

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Abstract

The invention relates to a method for bleaching hair. The method is characterized by comprising the following steps of: treating colored hair at a low-temperature area for certain time by using alkali solution containing thiourea dioxide to obtain the hair with off-white ground color; adjusting the pH value of the thiourea dioxide solution by using sodium bicarbonate and sodium carbonate; and adjusting the pH value of a bleaching solution to 8-10; wherein the concentration of the thiourea dioxide contained in the bleaching solution is 2-3 g / L, the temperature of the bleaching method is 40-60 DEG C and the heat preservation time lasts for 1-2 hours. By adopting the bleaching method, the bleached hair has lighter residual ground color, higher breaking tenacity, low injury tolerance, excellent handfeel and luster.

Description

technical field [0001] The present invention relates to a bleaching method, in particular to a method for hair bleaching. Background technique [0002] Most of the wigs are colored protein fibers, so the protein fibers should be dyed. The hair quality and color of different people's hair are not exactly the same. To ensure that different hairs have the same color when they are dyed in the same batch, the hair must be treated so that the base color of the hair before dyeing is basically the same, and then it can be dyed to achieve Specify requirements. [0003] Under normal circumstances, there are two types of colored hair colors: 1. Natural hair color (such as black hair of Asians, golden hair of Europeans, etc.); 2. Dyed hair (such as baked black, baked red, baked yellow, etc.). No matter which type of hair must be bleached, if it is natural-colored hair, you only need to use hydrogen peroxide when bleaching, and most of the dyed hair is dyed with acid dyes, metal compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L3/10D06L3/16D06L4/30D06L4/75
Inventor 周顺茹辛有志
Owner TIANJIN DEK CHEM
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