Why should you not wash your hair before Colouring?
Why should you not wash your hair before Colouring? What Happens If You Wash Your Hair Before Dyeing It? As it turns out, most hair dyes are designed to work better on hair that is not freshly washed. Skipping a wash allows for oils to build up on your scalp, which in turn helps protect against irritation that can be caused by hair dye.
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