What ordinary people are most worried about is the damage of hair dye to hair. KingLee, who has done a lot of bleaching and highlighting on hair, said that because a large amount of alkaline substances enter the hair during dyeing, the original protein and amino acids are destroyed, and the dyed hair will become dry and lose luster and elasticity, so the damage to the hair is inevitable. Try to use hair cream with low alkalinity.
3. When dyeing hair, some hair care ingredients are usually added, which is the popular hair care dyeing at present-hair care and hair dyeing are carried out at the same time. Levi believes that the biggest harm of hair dye to hair is that it contains hydrogen peroxide, which not only oxidizes but also bleaches. Before, white hair was dyed into black hair without bleaching, as long as the color was formed. It is popular to dye black hair in different colors, such as yellow and burgundy, which requires special substances, such as ammonia water, to bleach black hair first and then add artificial pigments.
4. Oxidant is an important part of hair dye, which is quite destructive to hair keratin and easy to cause damage to hair. Regular use will make hair dull, fragile, split and easy to fall off.
5. Most permanent hair dyes use aniline dye intermediates, which are highly irritating and toxic in cosmetic raw materials. No wonder some people have allergies and even dizziness and nausea when dyeing their hair.
Extended data
Matters needing attention
1. Be sure to have a skin test before dyeing your hair.
Keep your hair clean and dry before dyeing: don't do special care such as baking oil one week before dyeing; It is best to wash your hair the day before dyeing your hair; Don't use styling products on the day of hair dyeing? .
Comb your hair before you start dyeing it. When dyeing your hair, you don't need to use a comb. Please massage your head thoroughly with your fingers until the hair dye is evenly distributed on each hair.
Do not cover or wrap the hair after the hair dye is evenly distributed on it. Be sure to let the hair spread freely, let the hair fully contact with the air, and let the hair dye ingredients play the greatest role.
Whether you are using an open-shelf brand to dye your hair by yourself or going to a hair salon to find someone to dye your hair, you must have a skin test 3 hours before dyeing your hair. The method is to drop two dyes, A and B, on the same point on the inside of the wrist and wait for natural drying. If redness, itching, etc. occur during this process, the product can no longer be used.
Don't dye your hair if there are scratches on your scalp.
Remember not to wash your hair before dyeing it. First, the oil secreted by the scalp has a protective effect on the scalp. Second, you can avoid accidental scratches when washing your hair. If there is a wound on the scalp and then comes into contact with hair dye, it is easy to cause inflammation.
3. Apply lotion before dyeing your hair
Before dyeing your hair, you should apply lotion on the hairline and behind your ears to prevent the hair dye from polluting and damaging your skin.
4. Don't dye your hair during pregnancy and menstrual period.
Pregnant women are not suitable for contact with products with chemical dyes because it is not good for the fetus. During menstruation, women's endocrine and other aspects will change. In order to prevent problems, we should also avoid dyeing our hair.
When dyeing color, you can heat your hair with a suitable heater, which can halve the time for dyeing hair.
References:
Baidu encyclopedia-hair dye