20 Vol Developer On Dark Hair. Volume 20 is the best for gray hairs because a higher number will lift the color from all the surrounding hairs, exposing and emphasizing the gray instead of covering it. Opt for volume 30 developer to change your color by 3 to 4 shades. Volume 30 contains 9% hydrogen peroxide and is ideal for altering your hair several shades. May 17, 2022 · 30 volume developer can be very damaging when left in for too long. you should then leave the color on the hair for 10 minutes.
All you need to do is mix two tablespoons of volume 10 or 20 hair developer with a daily dose of shampoo. Then, wet your hair in the shower and towel dry it so that it remains slightly damp. Then, using plastic gloves and a brush. The best way to care for your hair while using 20 vol developer is by using a mixture of 20 vol developer and mild shampoo. This will help protect the hair shaft from the effects of the strong developer while still cleaning it thoroughly. You should use 20 volume developer when styling your hair with black hair dye. You shouldn’t use more than that in case the color becomes too dark. 20 volume developer with black hair dye. 20 volume developer on black hair.