My client has previously colored 7N hair (which I dont have the formula for) and 90-100% grey roots. Normal porosity.
What color line/formula would you suggest?
How do I avoid getting a line of demarcation?When performing a retouch on grey hair is it best to use a formula at the true shade (7n) or 1 or 2 lighter?
1 shade lighterWhen performing a retouch on grey hair is it best to use a formula at the true shade (7n) or 1 or 2 lighter?
I wouldn't go lighter. The color will lighten on the grey hair as she washes it.
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