1. If I want the color of Permanent Hair Cream to be natural black or dark brown, how do I adjust it?
2. When finished mixing Permanent Hair Cream with Developer Solution 9%, can it be stored for a long time? Or when using, mix 1 : 1.5
thank you
1. If I want the color of Permanent Hair Cream to be natural black or dark brown, how do I adjust it?
2. When finished mixing Permanent Hair Cream with Developer Solution 9%, can it be stored for a long time? Or when using, mix 1 : 1.5
thank you