How long should you leave purple shampoo on dry hair?
The average time you should leave purple shampoo on dry hair is 3-4 hours. Why does my blonde hair turn yellow? There are many reasons why your blonde hair may turn yellow. Some of the most common reasons are:1. Sun exposure2. Keratinization3. Age4. Hormone therapy5. Hair loss6. Chemical processing How much should I pay for ... Read more...