Plasticine
Plasticine was invented in Bath, England in 1897 by an art teacher, William Harbutt. In 1983 production was moved to Thailand. Several attempts have been made to change the formula to evade the patent and its licences. There are a number of similar products, but none has proved more successful. There is, however, a good market for epoxy products which set hard after being applied as a liquid or putty. Plasticine does not set hard.