What's the % of grey and natural level? I'm assuming that you're saying that the % is low, such as only at the temples or different parts of her hair. It's natural that the grey is going to appear lighter, because it's void of pigment and only needs deposit, where the darker parts have to lift through different stages to get lighter. My solution would be to mix two formulas. Formulate at a higher volume such as 30 or 40 vol developer at the darker areas, even if some grey is present, and use the 50 series with 20 vol developer where she is 50% or more grey. This is just a guess about what you were trying to ask, correct me if I'm way off base. |
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