Process:   There are a number of different processes but they share the release of air/gas into the plastic so that it fills with bubbles and foams within a two part metal mould of the desired shape

Introduced:   Post World War 1

Plastics:   Most, especially polystyrene, polyurethane, polyvinyl chloride

Marks:   None

Tooling cost:   Medium

Production volume:   High

Uses:   Packaging; sponges; soles of shoes; steering wheels; vending cups, insulation; foam furniture