Im dying my hair, a combination of level 4 and 5.Im wondering what level of peroxide i should use to mix the colour with?Thanks!

[roymiller]

Yes, developer is called peroxide, unless your using a semi then the devoloper you use is usually 10% or 5%, but if you have peroxide then use 20%, its not damaging on the hair, you only need to use anything higher than that if you are going lighter.

[davidesamulson]

No i think you should not use it because i have personal experience.

[jaspercolman]

The first tip to hair color perfection would be to find the right shade for you. It contains a small amount of peroxide which means a small amount of hair damage.