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20 vol developer (for bleach)
For the bleach step, I used a 20 vol developer for my at-home bleach wash experiment. My goal was to lift and loosen up the yellow tones enough to make toning actually work for a beige blonde match.
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Pros
- +Provides enough lift to shift stubborn warm/yellow tones
- +Common strength for controlled at-home lightening when used carefully
Cons
- -Can be drying or damaging if over-processed or used too often
