Color SHOCK professional dye is mixed with developer at a 1:2 ratio — two parts developer to one part dye (e.g. 60 g dye + 120 ml developer). Choose the developer strength by goal: 10 vol (3%) for tone-on-tone and grey coverage, 20 vol (6%) for 1–2 levels of lift and reliable grey coverage, 30 vol (9%) for 2–3 levels of lift. Mix only in a non-metallic bowl and use immediately.
The standard Color SHOCK ratio is 1:2. For example: 60 g dye + 120 ml developer. Always measure with a scale or measuring cup — mixing by eye gives unstable results.
Weigh the dye, add developer at 1:2, mix to a smooth cream, apply evenly, process per instructions (usually 30–45 min) and monitor visually.
Too strong a developer for grey coverage, an inaccurate ratio, or reusing old mixture all harm the result and longevity.
1:2 — one part dye to two parts developer.
Usually 20 vol (6%) — it reliably covers grey hair tone-on-tone.
Yes, shades can be intermixed; developer is added to the total dye amount at 1:2.

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Read full bio →A beginner needs a base palette of natural (.0) and ash (.1) tones plus a developer set (10/20/30 vol). Why the 180 ml pack suits practice.
Read more →TipsA precise calculation: the dye cost of one coloring with Color SHOCK 180 ml is about €2.63 — roughly 76% less than a standard 60 ml pack.
Read more →The numbers speak for themselves. Try Color SHOCK 180 ml dyes and feel the difference in Your work — from the very first application.
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