Mixing Colour
If you have extra thick or long Hair, double the mixing amount.
If you have very short Hair, halve the mixing amount.

Regular Colours
1 part Hair Colour
with
1.5 parts Developer

eg. 1 Tube of Hair Colour
with 1 Bottle of Developer.

High Lift Blondes
1 part Hair Colour
with
2 parts Developer

eg. 1 Tube of Hair Colour
with 120mls of Developer.