It can be used safely on sensitive scalps. It is a natural mineral ingredient and herbal extract of Bentonite which is good for hair. It reduces scalp irritation and relieves itching and stinging when dyeing. Bentonite to keep your scalp healthy? Ash that fell into the sea about 30 million years ago is a clay mineral produced by acting with salt. It has a nano-level fine crystal structure and contains about 60 kinds of minerals. It has cation exchangeability, adsorption, moisturizing and swelling characteristics. More than 60 natural minerals, including silicon, potassium, magnesium, and zinc, contained in Bentonite, provide nutrients to the scalp. Ammonia is not added, so it is less irritating to the scalp, relieves itching and stinging, and it is possible to dye comfortably with a soft flavor of herbal ingredients. Coloring of hair shop experts It is a proven product used by experts of over 400 scalp & hair care shops nationwide.