How Much Developer To Color
If using a 20 volume developer to cover gray or to produce a color lighter than your original then give the product 30 to 45 minutes of developing time.
How much developer to color. In general the processing time for using a 10 volume developer runs 25 to 35 minutes. Also to lighten your very dark roots to even out the color of the lengths. For working on dark strands eg.
For at-home bleaching its best to stick with 10 20 and 30 developers which lift your color from one to three shades up. Lighter shades such as platinum or pale blondes will need a 20 volume stuff. First off it is optimal for covering grey hair.
1 part color with 2 parts developer 1 oz. Pour 1 12 oz. Confessions of a cosmetologist.
Use volume 10 developer to lift your color a single level. Whether it is half a bottle 1 ounce or a spoonful use exactly the same volume of developer as dye in every application. 20 volume developer is used to slightly lighten hair up to 2 tones and allow permanent pigments to get inside the hair cuticle.
Of hair color combined with 2 oz. The ratio will be 1 to 2. Too much or too little developer results in inappropriate hair color results.
Opt for volume 30. Pour 1 12 oz. Most hair dye will require a 1-to-1 20 volume developer to hair color but if you are using high lift hair color youll want to go up.