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you use 20 volume developer on gray hair
A 20 volume developer will be sufficient for coloring facial hair, especially if there are some grays mixed in.
30
30 Volume Cream Developer is generally used for high-lift color, blonding, and bleaching.
20 or 30 Volume developer is recommended for blonding.
20 volume
Yes, the appropriate volume developer must be mixed with any Matrix color.
Yes, this lightener needs to be mixed with at least a 20 Volume developer.
20 volume.
when you want to get 2 levels of lift
Which developer you use will depend on the color you want to achieve. A 20 developer will give you a darker color than a 30 or 40 developer.
40 Volume developer is not recommended to use when bleaching hair as it is very strong and can cause major damage if not done by a professional. 20-30 volume would be better and safer for home use.