Karen Gillan Hair Color Formula: Natural Level: 6 (Virgin hair) 2) First, you will apply her base color with the following hair color formula: 7BC (1oz) 8BC (1oz) 6TO (1/2oz) Mix with: 20 volume Hairmonics developerThe Hairmonics is a faster processing developer, and is good for exposing warmth in the hair – if that is the desired result). [Continued] #redhair #redhaircolor #formula

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