About the product:Use the Satin Developer that best fits your hair, mix with Satin Color into a rich, creamy, stay-put application.The silicone base in the Satin Developer provides a color-protecting barrier on the hair fiber, resulting in a much longer retention of color.
10 Volume is used to go tone-on-tone darker.
20 Volume is used to deposit tone-on-tone or lift up to two levels of natural color.
30 Volume lifts up to three levels of natural color.
Cover Grey Developer is use Cover Grey Developer to get the best grey hair.