Black: Keratin, [+/- CI 77266 (Black 2)] Dark Brown: Keratin, [+/- CI 77491 (Iron Oxides), CI 77499 (Iron Oxides)] Medium Brown: Keratin, [+/- CI 16035 (Red 40), CI 19140 (Yellow 5), CI 42090 (Blue 1)] Light Brown: Keratin, [+/- CI 19140 (Yellow 5), CI 15985 (Yellow 6), CI 16035 (Red 40)] Nanogen hair fibre dyes are all cosmetic approved edible dyes - the same as those used in the food industry














