Naturtint Permanent Hair Color is the first permanent hair color certified by the USDA BioPreferred program, Enriched with plant & seed oils and extracts, Naturtint Permanent Hair Color provides everything you need to color, nourish and protect your hair and scalp in one complete treatment. Dermatologist tested to ensure it is gentle on the hair and scalp, Naturtint’s naturally derived plant ingredients deliver deep hydration and softness with natural looking results. The ammonia free formula eliminates harsh odors and contains no artificial fragrances, gluten, parabens, resorcinol or heavy metals. Naturtint is vegan and cruelty free! 1 box is typically enough for shoulder length hair. If your hair is longer than shoulder length, we recommend using 2 boxes. Leading in Innovation: For more than 20 years Naturtint has been at the forefront of reducing the amount of chemicals in hair color. The innovation of Naturtint’s manufacturer, Phergal Laboratories in Madrid, Spain led to a permanent ammonia free hair color in 1994. Through Phergal’s advanced technology and strong quality management systems, Naturtint adheres to ethical manufacturing principles and strict EU (European Union) regulations. Important Information:See instruction leaflet enclosed in each Naturtint kit for complete application instructions.Always perform a Color Strand Test and Sensitivity Test 48 hours prior to each use.