Hair dyeing is to use the alkaline components in the dye paste to open the hair scales on the surface of the hair (the scales on the hair open when exposed to alkali), and artificial pigments enter the cortical layer of the hair and combine with some natural pigments to form the desired color. Hair dyeing is beautiful. Choose the right hair dye and learn more about hair dyeing. For example, dyeing hair should not be too frequent, not more than twice a year, and it should be dyed where it has just grown. You can use permanent hair dye on your scalp before dyeing your hair ... you should use less permanent hair dye. Consumers who use permanent black hair dyes should consider switching to light hair dyes. Generally speaking ... don't dye your hair with different hair dyes at the same time. Chemical reactions may occur between hair dyes. People with boils, skin ulcers and allergies to hair dyeing should not dye their hair. If you insist on dyeing your hair, you must do an allergy test and wipe it clean ... After dyeing your hair, wash it several times and don't let it remain on your hair; Be careful not to scratch your scalp with your fingers when washing your hair.
The starting point of hair dyeing should be based on healthy hair care, and the hair dye that suits you is the best. When buying hair dye, don't just look at the hair color description of the hair dye. First, focus on the product composition description, and whether there are some approval numbers, production batch numbers and hygiene license numbers of the national health department on the product. It depends on the production date and manufacturer of the product, and you can check the authenticity of the manufacturer on the Internet yourself, so that there is generally no big quality problem when buying hair dye. Secondly, don't think that expensive is good, let alone that it is good as long as it is in a physical store. If you want to stay away from those ultra-high carcinogenic hair dyes, you must learn to distinguish from the smell of hair dyes. Real high-quality hair dye will not have pungent smell (essence smell), but when used on hair, it will have a faint aroma. If there is a pungent smell, this kind of hair dye should be carefully selected.