It depends on the technique. Blond Studio Multi-Techniques powder is a versatile all-rounder for foils and full-head lightening. Blond Studio Clay is dust-free and ideal for freehand and balayage, holding its shape off the scalp, while Blond Studio Oil is designed for on-scalp lightening and a gentler service. Choose the format that suits the result and application.

L'Oreal lighteners are mixed with L'Oreal Oxydant cream developer. Lower volumes (10–20 vol / 3–6%) give gentler, more controlled lift; higher volumes (30–40 vol / 9–12%) give maximum lift. The mixing ratio varies by product, so always follow the professional instructions for the specific Blond Studio lightener.

Developer volume controls how much the cuticle opens and how much lift you achieve. 10 vol (3%) is for deposit and toning, 20 vol (6%) for grey coverage and one level of lift, 30 vol (9%) for two to three levels, and 40 vol (12%) for maximum lift. Higher volumes lift more but require careful professional handling.

L'Oreal Oxydant developers are designed for use across L'Oreal Professionnel colour and lightening ranges, but mixing ratios differ — Majirel is 1:1.5, INOA is 1:1, and lighteners vary. Always match the developer volume and ratio to the specific product and follow L'Oreal's professional guidelines.