Schwarzkopf Igora Zero Amm 7-21 Medium Cendrè Ash Blond 60ml - permanent colouring
Permanent colouring.The system is based on a combination of up to 4 numbers.The number before the hyphen indicates the tone height on which to use the shade.The first number after the hyphen indicates the primary reflection - the second number after the hyphen indicates the secondary reflection - two identical numbers after the hyphen indicate the reinforced main reflection - the third number after the hyphen indicates a minor reflection.
Mixing ratio 1:1 for normal colours.Mixing ratio 1:2 for super-lightening special colours.Application for natural hair: apply first to the mid-lengths and ends.After 10-15 minutes apply to the roots.For regrowth: apply first to the roots.After 15-30 minutes use the Dual-System technique on the mid-lengths and ends.Application time: less than or equal to 30 minutes 10 volumes (3%)30-45 minutes 20 volumes (6%)30-45 minutes 30-volume (9%)30-45 minutes 40-volume (12%)