Use 3% Color & Care Developer when coloring darker. Use 6% Color & Care Developer for tone-on-tone, 1 tone lighter or coverage. Use 9% Color & Care Developer for coloring 1-2 tones lighter. Use 12% Color & Care Developer for coloring 2-3 tones lighter.

Can I use any developer with igora?

Yes you can. Developer is same chemical in various brands.

Should I use 20 or 30 volume developer?

For instance, if you have more than 50% gray hair, 20 volume developer is the only developer to use for 100% gray coverage and a long-lasting color. ... Choose a 30 volume developer when you want a developer that is stronger for a lighter and deeper color.