Nuances

Reflections on lighter or darker hair up to 2 tones.

On average 3h15m.

On average 3 months, depending on hair growth and the desired effect.

Sintetic

Incompatible with hair straightened with ammonium thiogliocate or guanidine. Incompatible with hair coloured with henna or progressive colouring. You'll have to wait 1 week if you've had Slett formaldehyde-free straightening and you can do it the same day if you've had laser straightening.

Not suitable for children under 16, or if you have a rash on your face or a sensitive, irritated or damaged scalp. It is also not suitable for anyone who has ever had a reaction after colouring their hair, or after a temporary "black henna" tattoo. Pregnant women should seek medical advice.