Hello, please ask for shampoo to cover white hair. You can use -
SemiColor - Wood Black (
สีผม Semi-Permanent Black) -
ColorFix™ (ช่วยให้สีผม ติดดียิ่งขึ้น) with N70,
Coco Betaine , Cocamide DEA, NaCl? and in what proportions should it be used? thank you very much