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Only use with Blond Studio Nutri Developer20, 30 or 40 volume (maximum)
Open Air and Freehand: Apply a 1:1 to 1:2 mixing ratio for off-scalp application (using 20, 30 or 40 vol)
Enclosed: Apply a 1:5 to 1:2 mixing ratio for enclosed application (using 20 or 30 vol)
On-scalp application: Apply a 1:3 mixing ratio for on-scalp application (using 20 or 30 vol).
Development time: up to 50 mins.