What is a cold wave perm?


Cold wave perms, invented in 1938 by Arnold F. Willatt, use no machines or heat. Hair is wrapped around rods, then a reduction lotion containing ammonium thioglycolate is applied, followed by an application of hydrogen peroxide. This reforms the hair to the shape of the rods. This process takes 6-8 hours at room temperature.
1 Additional Answer
A cold wave perm is a method of styling hair that uses the cold-waving technique to break down the bonds of the hair. The technique of cold waving does not use any machines or heat and it is done by applying a lotion containing ammonium thioglycolate.
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