Brand from South Korea: PUREDERM. Ammonia free No mixing How to use. 1. Fold the pouch along the dotted line. 2. Tear to open the pouch. 3. Squeeze the pouch to dispense both Hair Color and Developer onto a hair dye brush. 4. Comb hair with the brush to distribute the color evenly. 5. Leave for 10 minutes. 6. Wash off with running water.