How much 20 volume developer to mix with hair color?
When mixing hair color with 20 volume developer, the ratio and amount will depend on the brand and type of hair color you are using. However, a general guideline is to use the following:
- 1 part hair color
- 1.5 parts 20 volume developer
For example, if you are using 2 ounces of hair color, you would need 3 ounces of 20 volume developer. Make sure to check the instructions provided with your hair color to ensure the correct ratio and mixing instructions are followed.
