Follow Safety Warnings. Perform the skin allergy test 48 hours before coloring. Important Safety Warnings: Hair color products may cause allergic reactions, which in rare cases can be severe. Tattoos may increase the risk of allergy to this product. Conduct a skin allergy test 48 hours prior to each application, even if you have already used coloring products before. Remember to buy the product 48 hours in advance. Do not use this product if you have experienced any reaction to hair color products or have sensitive, irritated or damaged scalp. In these cases, do not conduct the skin allergy test and consult a doctor before using any hair color product. Read and follow instructions carefully. In rare cases, use of hair colorants has been associated with temporary or permanent skin depigmentation (skin lightening or loss of color). If you notice any skin depigmentation or other unexpected reaction such as pain or severe itching, discontinue use immediately. Caution: This product contains ingredients that may cause skin irritation on certain individuals and a preliminary test according to accompanying directions should first be made. This product must not be used for dyeing the eyelashes or eyebrows. To do so may cause blindness. Product not intended to be used on children. Keep out of reach of children.