Schwarzkopf Igora Royal Highlifts 10-0 Ultra Natural Blonde 60ml - permanent colouring

The system is based on a combination up to 4 numbers
The number before the dash indicates the tone level of the shade
The number after the dash indicates the primary highlight, the second number after the dash indicates the secondary highlight, two identical numbers after the dash indicate the reinforced main highlight; the third number after the dash indicates the minor highlight

Mixing ratio 1:1
Apply first to mid-lengths and ends, after 10-15 minutes apply to roots
Application time: 30 minutes ( 10 volumes) 30-45 minutes ( 20 volumes) 30-45 minutes ( 30 volumes) 30-45 minutes ( 40 volumes)