To be used on base 6 and darker. Mix colour creme 1:1 with Igora Royal Oil Developer 12% 40 Vol. To protect the hair line use Schwarzkopf Professional Skin Protect cream and wear gloves. Development Time: 30-45 min Shampoo the hair with BC pH 4.5 Color Freeze shampoo and stabilize the hair with Schwarzkopf Professional Hair Sealer.