2:1 Igora Royal shade on E-1

For use on bases 8–7: mix IGORA ROYAL shade with E-1 in a 2:1 ratio Extract E-1

1:1 Igora Royal shade on E-1

For use on bases 6–5: mix 1:1 with IGORA ROYAL shade and E-1 Extract E-1

1:2 Igora Royal shade on E-1

For use on base 4 and darker: mix 1:2 IGORA ROYAL shade with E-1 Extract E-1

1:1 with Oil Developer 3% (10 vol)

For extra cool results, simply use the Extract E-1 on its own in a 1:1 mixing ratio with the 3% / 10 Vol. IGORA ROYAL Oil Developer. Extract E-1

up to 5% of the colour cream

neutralisation on bases 8 and 9: add up to 5% in the colour cream Neutralisers, how to mix

up to 15% of the colour cream

Neutralisation on bases 6 and 7: add up to 15% in the colour cream Neutralisers, how to mix

up to 25% of the colour cream

Neutralisation on a scale of 1 to 5: add up to 25% of the cream colour Neutralisers, how to mix

increase amount of oil developer proportionally

When adding a neutraliser to your colour formula, you need to increase the amount of IGORA ROYAL Oil Developer accordingly. Neutralisers, developer

up to 50% of the colour cream

Your booster will make up to 50% of the cream shade in your formula Boosters: how to mix

too many boosters reduce coverage

watch out: adding too much booster will reduce coverage, so make sure you adjust the amount of colour and the way you apply accordingly Boosters: how to mix

increase the amount of developer proportionally to achieve the target depth of colour

When adding a booster to your chosen IGORA ROYAL shade, the amount of developer must be increased proportionally to maintain the target depth Boosters, developer