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jenny asked in Beauty & StyleHair · 3 years ago

10 or 20 developer, which do I need?

My current hair color is a level 5 medium brown. I would like to dye it 1 shade darker like a level 4 dark chocolate brown. I am purchasing my color at a local beauty supply store and would like to know if I should use a 10 or 20 developer. Thanks

1 Answer

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  • ?
    Lv 7
    3 years ago

    I would go by what the instructions say.

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