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10 Vs. 20 Volume Developer: How They Differ And How to Pick One

When bleaching or dyeing your hair, you have to choose the right developer volume. Two of the most common options are 10 and 20. People often get stuck choosing between them. Developer contains hydrogen peroxide, which helps open the cuticle so color can deposit or lighten. 20-volume developer contains more hydrogen peroxide than 10-volume developer. …