1. Hair itself has no PH value. By PH, we mean the pH of secretions around the hair.
2. The PH value is the indication of the pH mark, and it is the pH value in the aqueous solution. Represented by numbers between 0- 14, 7 numbers are water-based, 7 numbers are above water alkalinity, 7 numbers are below water acidity, and the pH value of hair is between 4.5 and 5.5, which is the best water health state.
3. Because the hair will separate and crack when it meets the alkaline epidermis, the hair will become rough and porous, and the dyeing effect cannot be achieved. When the epidermis is closed in acid, the natural PH value of hair is 4.5-5.5, and the texture and luster of hair are good, which is easy to achieve ironing effect. Hair quality classification
The type of hair quality is determined by the natural state of hair, that is, by the amount of sebum produced by the body. Different hair types have different characteristics.
1, neutral hair:
If the hair is not greasy and dry, then it belongs to neutral hair. This is shiny, soft and healthy hair.
Features:
Not greasy, not dry, moderate hardness, rich, soft, smooth and natural luster. Oil secretion is normal, with only a small amount of dandruff.