if ur hair is black and you wanna get it to a bright blue, you should normally use the 30 volume developer (9% hydrogen peroxide) mixed WITH BLEACH. make sure you get the bleach to developer measurements right as its on the instructions. and when ur hair is bleached, towel dry it, wait for some time. then finally u can apply the blue color dye. the...... 4 reply
did live in a bad country
