Weakly acidic hair with a PH of 4.5 is an ideal healthy hair.
Hair can be said to be healthy if its PH value is maintained at 4.5-5.5 with weak acidity. However, the main component of dyes is alkaline substances.
The general PH value is 9- 12. After using strong alkaline hair dye or perming agent, the PH value of hair begins to become alkaline and dry. If you use strong alkaline shampoo on the market, your hair will become drier and looser.
Generally speaking, acidic shampoo will shrink hair. Acidity can moisturize hair and increase luster. Weak acidity can prevent hair from getting messy, and it will be easier to comb after washing with shampoo.
Weak acidity can prevent the growth of dandruff and prevent water loss. On the contrary, alkalinity will prevent the epidermis from producing sebum, resulting in dry and lifeless hair.
2.
Vinegar is an acidic substance and an alkaline food.
Therefore, it is beneficial for people who perm or dye their hair to choose acidic shampoo to wash their hair. Vinegar is used to maintain hair, it's really hard to say … it's not a method worth promoting, so think about it.
Most people think that vinegar is acidic because it is acidic, but it is actually an alkaline food, although it contains a little weak acidity. Because the substances decomposed after entering the human body are alkaline, they are classified as alkaline foods.
Moreover, vinegar is also made from representative alkaline foods such as cereals and fruits.
The easiest way is to use the weak acid shampoo sold by beauty salons. Compared with vinegar, using special products should be the safest method.