Question: how to use kuul color system?
Answer: Directions: Once the appropriate Küül Permanent Hair Color and Developer have been selected, use a mixing ratio of 1:1½ (color:developer). In a non-metallic bowl measure 4.56 fl oz (135ml) of Küül Cream Developer and add 3.04 fl oz (90ml) of Küül Permanent Hair Color. Mix well.