【How-to】Is it bad to crimp your hair

Hair crimping is a method of styling usually straight, long hair so that it becomes wavy, often in a sawtooth / zig-zag fashion. … In 1972, the modern crimping iron was invented by Geri Cusenza, the original founder of Sebastian, for Barbra Streisand’s hair. Crimping peaked in mainstream popularity during the mid-1980s.