Question: can i lighten my hair with 20 volume developer?
Answer: Bullet-Point Summary: How to Bleach Hair Without Damage Use a good quality bleach, and 20 or 30 Vol developer. The right bleach to developer ratio is 1:2 ratio. Use 20 Vol for the regrowth area, and when you need to lift by 1-2 levels. Use 30 Vol for the lengths, and when you need to lift by 3 levels or more.