- Mix 1 part Wella Color Charm Color (or any permanent hair color) with 2 parts Well Color Charm Cream Developer.
- Apply to the hair using your desired technique, develop for 30 minutes and up to 45 minutes if additional depth or gray coverage is needed.
- Use whenever coloring directions call for 20 volume developer.
- To create 10 Volume mix equal parts of distilled water and 20 Volume.
Use with Wella Color Charm liquid hair color for vibrant, long lasting, fade resistant results.