diatomacea
New Member
So, my hair has been dyed to a level 8/9 copper and I want to go back to level 7 copper with permanent color. Should I use a 10volume developer, or a 20 volume, or mix both to make 15 volume?
What option would give me the least fading possible and maximum color deposit?
Thanks for the help
What option would give me the least fading possible and maximum color deposit?
Thanks for the help