Use the Satin Developer that best fits your hair mix with Satin Color into a rich creamy stayput application The silicone base in the Satin Developer provides a colorprotecting barrier on the hair fiber resulting in a much longer retention of color 10 Volume is used to go toneontone darker 20 Volume is used to deposit toneontone or lift up to two levels of natural color 30 Volume lifts up to three levels of natural color