How long should brown and dark shades be left on?Updated 4 months ago
The recommended processing time for all khadi brown and black shades is 60 minutes. For a particularly intense result, you can increase the processing time to up to 90 minutes.
Ash brown, dark brown, black, and pure indigo require ColorPrep as a pre-treatment on gray hair, which should also be left on for 60 minutes.
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