If we can pay attention to the following aspects, it will be very helpful to reduce the damage of bleaching powder to hair.
1. hair quality diagnosis: hair quality diagnosis is an essential step before hair bleaching. Only accurate hair quality diagnosis can determine the deployment and operation of hair bleaching.
2, no need to wash your hair: dry hair operation is the most basic requirement of bleaching operation. If you wash your hair before bleaching, bleaching powder will feel itchy and uncomfortable when it comes into contact with your hair; If you don't wash your hair before, this feeling will be reduced.
3. Mixing proportion: The scientific mixing proportion needs to be determined according to the hair quality conditions. For example, the proportion of dust-free bleaching powder in Na Wei can range from 1 1, 1.5, 1.2 to 1.3, depending on the customer's hair quality conditions and required chromaticity.
4. Combination of dioxygen milk: Bleaching powder and dioxygen milk can be mixed together to achieve the best bleaching effect. It is very important to choose the concentration of dioxygen milk.
We find that many hairdressers often use high-concentration hydrogen peroxide to bleach their hair, but actually forget an important principle: in the process of bleaching hair, the higher the concentration of hydrogen peroxide, the greater the damage to hair. Generally speaking, 6% hydrogen peroxide and bleaching powder are used to bleach hair.
It can reach almost all the chromaticity needed in daily life. In some cases, 9% can be considered, but 12% dioxygen milk is absolutely forbidden to be used in bleaching process. Moreover, it should be reminded that among all oxygenated milk, only oxygenated milk with a concentration lower than 6% can be used for hair roots. In other words, only the dioxygen milk with a concentration below 6% can touch the hair, and the rest can't.
5, the degree of bleaching: In the process of bleaching hair, it is not that the lighter the hair, the better. It is not that the lighter the hair is bleached, the easier it is to color. This is a misunderstanding and the main reason for hair damage. If the target color is lighter than the base color by more than 4 degrees, only the chromaticity of bleached hair needs to be close to the target color 1-2 degrees, and it is not necessary to be lighter than the target color.
If the hair has been dyed with dark artificial pigment, if you want to continue to change the hair color lighter than the existing color, you need to bleach the light-colored hair whose color exceeds the target color 1-2 degrees before dyeing. Therefore, in the process of bleaching, the brightness of bleaching is difficult to control, and it needs constant practice to be effective.
6. Standardized operation: According to the health and damage of hair, it is decided which part of the head to apply bleaching powder first, which can reduce the action time of bleaching powder on damaged hair and reduce its damage.
7. Action time: The action time of bleaching powder is 50 minutes. Don't blindly extend and shorten its action time when parking. Covering will do harm to hair, especially in the process of parking. Observe the color change and reaction from time to time, and stop its function when it reaches the required chromaticity, so as not to do harm to hair.
8. Sufficient dosage: A perfect bleaching effect requires sufficient dosage. When our dosage is too small or uneven, spots and uneven color are most likely to occur.
9. Essential care after bleaching: Mastering the above knowledge in the bleaching process can basically achieve a perfect bleaching effect, but if the hairdresser can recommend scientific and reasonable home care methods, it will be a more perfect result. Because a small amount of alkaline molecules and oxygen molecules will remain in bleached hair, it is essential to recommend the use of post-dyed shampoo and conditioner, which can effectively prevent the continuous oxidation and damage of residual substances to hair and achieve bright and lasting hair color effect.