Oligo Calura developers have been formulated to ensure perfect stability, ideal consistency, and reliable, predictable results. They should be used as follows:

10 Volume (3%) - Tone
20 Volume (6%) - Tone-on-tone deposit or darker, lift 1 to 2 levels, grey coverage
30 Volume (9%) - Lift 3 levels, grey coverage for resistant grey hair
40 Volume (12%) - Lift 4 to 5 levels