Althuogh water colors will yield long lasting luminous results without use of harsh ammonia or peroxide, an allergy is always possible and even if you have already used water colors before, the following patch test must be
done one day before actual application:mix a small quantity of poder and warm water as described above and apply on clean reaction occurs, use without risk of allergy or hypersensitivity. Remember this is for external use only to color hair on the scalp (not the eyebrows,eyelashes or any other facial hair.) If water colors are accidentally applied to the eyes,rinse thoroughtly whit water. Do not use on cut or abraded scalp.