For mistake-proof, precision balayage try the Blond Studio 7 Clay Powder Lightener by L'Oreal Professionnel. Blond Studio 7 contains 19% pure clay for a stretchy, pliable texture making it the easiest lightener to work with for open-air, balayage lightening services.What else you need to know: Up to 7 levels of lift; Stretchy texture for best lift and control; Made specifically for open-air balayage techniques; No ammonia, no heat, no foils; Soft, seamless results.