Grimator complex was established by Hossein Shirdel (beauty business consultant) with the aim of raising the level of beauty salons, clinics and other beauty centers in the salon in 2013 and started its professional activity in the field of training and consulting beauty businesses. What is hair rebonding? Permanent hair straightening or Japanese straightening or rebonding is a method that was registered in the United States in 1992 and is currently the best and least dangerous and without side effects method for straightening hair in the world. Hair is made up of amino acids that are joined together by bonds that determine the structure of the hair. Hair rebonding, also called nano-rebonding, involves breaking down these bonds and rebuilding them to change the texture of the hair. Rebonding is more recommended for people who want to straighten their hair and want to have bare and straight hair forever. The most important feature of rebonding is that after washing the hair, there is no need for brushing and ironing, and in hot and humid weather, the hair maintains its smooth state.