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Matrix Universal Developer 30 Vol 946ml
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Your Questions Answered
The primary goal when using a developer for grey hair is to open the hair cuticle enough to deposit colour. As such, the most commonly used hair developer for grey hair is a 20-volume developer because it provides sufficient lift for most colour preferences, without excessive damage.
For no-lift hair colour a 10-volume developer is sufficient, as it is only used to open the cuticle layer. When lightening is required, 20-volume developer is a good choice as it will limit damage to the hair. For significant lightening, a 30-volume or 40-volume developer can be used but should only be used by professionals.
Hair developer helps to activate colour molecules in hair dye, assisting the dye to penetrate the hair cuticle for a permanent colour change. The volume strength of the developer determines the level of lift and colour deposit.