Indigo powder is obtained from leaves of plant Indigofera tinctoria. For Shades of Brown to Black used w/Henna Powder Indigo powder (latin name: indigofera tinctoria) is free of any added toxic chemicals, or additives such as metallic salts, PPD (paraphynelinediamine) and ammonia. 100% pure and natural. Gives natural and attractive color to hair. Dispels heat and have a soothing effect. Revitalizes the hair. Cause no irritation to the skin. Free of any added toxic chemicals, or additives such as metallic salts, PPD (paraphynelinediamine) and ammonia. Directions for Use:- Mix indigo leaves powder with lukewarm water and make a thick paste. Allow this paste to sit for 10-15 mins so that the dye releases. Apply this paste on hair with a brush. Comb after five minutes for the paste to reach the hair roots. Wash off the paste after 1 hour (minimum) thoroughly.