E.H. Thiellay, a British pharmacist and perfumer, along with Leon Hugo of Paris, a hairdresser, invented peroxide, a blonding chemical. The product was introduced in 1867 at the Paris Exposition. It was considered the first hair bleach.
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The National Cosmetology Association Hall of Fame is located in St. Louis, Missouri. New members are inducted into the Cosmetology Hall of Fame at the annual convention held every summer.