Hair treatment is a process of styling and caring for hair. A perm is a chemical treatment that changes the structure of the hair, making it curly or wavy. A RINSE is a liquid used to cleanse the hair after shampooing. A TINT is a semi-permanent hair color that adds subtle highlights to the hair. Singeing is a technique used to remove split ends from the hair. Dandruffshampoo is a type of shampoo specifically designed to treat dandruff.