The amount of lightening listed below is approximate and is affected by the texture and natural color of the hair.
There are 4 chromastics developers
10-Volume for less lightening
10-Volume for use with Deposit-Only
10-Volume for use with Liquid Shades
20-Volume for standard lightening
25-Volume for resistant hair
40-Volume for extra lightening
30-Volume is created by mixing equal parts of 20-Volume and 40-Volume.
All chromastics colors and lighteners are mixed in a one-to-one ratio.