The Oxidizing Agent or Developer is hydrogen peroxide in one of various forms and strengths. lt is the catalyst or cause of the chemical reaction which allows the formula to permanently alter the hair's color. The strength of the developer - is determined by the desired results and the manufacturer's directions.
10 Volume - Color deposit with only slight lightening.
20 Volume - Maximum color deposit as for gray or white hair with lightening
30 Volume - . Strong lightening action with less color deposit.
Bleaching Boosters - can be added to increase lifting action. Consult manufacturer's instructions . Too much developer and the color may not have good highlights, cover poorly, not lift to the correct level and fade more quickly.