Vintage Crayola Crayon Retired Formula COPPER With Bronze Oxidized Used

Vintage Crayola Crayon Retired Formula GOLD With Bronze Oxidized Powder Green Retired formula Loose No box 1 crayons crayon Crayon is in good USED vintage condition. Please see pictures for all details. The original formula for Crayola, copper and gold colored, crayons contain bronze powder, which in the presence of stearic acid will oxidize overtime, causing a green color. This oxidation process is the same as occurs on a penny or the Statue of Liberty. The new formula change took place during 1994 and continues today in both copper and gold crayons. This crayon is the old formula.