Size:6% / 20 Volume Schwarzkopf's new Oil Developer is a conditioning,caring peroxide that's optimised to work with new IGORA ROYAL but which can also be used with old-style IGORA if you still have some tubes to use up. It comes in 4 strengths: 3% (10 vol),6% (20 vol),9% (30 vol) and 12% (40 vol). Use them as follows: 3% for darker or pastel colouring and for covering 100% white hair; 6% for tone-on-tone colouring,white hair coverage and lightening 1–2 levels; 9% for lifting 2–3 levels (3–4 levels with the Special Blondes),colouring with -00 shades and white hair coverage with the Absolutes; 12% for lifting up to 5 levels and for colouring with the Fashion Lights.
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