It's Pure Organic Herbal Hair Dye in Indigo Black 100g

100% pure, fairly traded organic Indigo Black herbal hair dye, made in the UK. A non-invasive plant colour that gently coats the hair shaft to naturally darken brown hair towards black, add glossy natural colour and increased volume. Colour develops in 0.5 to 4 hours and typically lasts around 3 to 4 weeks on roots. Free from synthetic chemicals, PPD and ammonia. Key benefits: Gives glossy, natural-looking colour and increased volume (maximise leave-in time for deeper shade) Conditions and strengthens hair, leaving a healthy shine 100% certified organic indigo, fairly traded and chemical-free Indigo Black works by semi-transparently coating your hair shaft; the final shade depends on your existing hair colour and porosity. It may darken brown hair to a darker brown or black; lighter or grey hair must first be coloured red or brown before applying Indigo Black, otherwise an unattractive bluish tint can occur. Leave-in time of 0.5 to 4 hours determines depth of colour; longer or repeated