Lightens up to 4 levels and adds gold tones. Use on medium brown to light blonde hair. Mix 2 scoops Kaleidocolors Gold tonal powder lightener with 1 ounce (30 ml) 20 Bolume Pure White Developer - use off scalp - process up to 10 minutes with heat or 30-45 minutes room temperature. One full and one about 1/2-1/3 full