Plate mould made by Waterford Wedgwood UK. One way of producing plates is to squash dry powder in a dust pres. Clay powder is squashed between the steel mould, which shapes the top of the plate, and a plastic mould which shapes the underneath. The plates made from squashed clay dust are very fragile, so a conveyor belt takes them straight to a kiln where they are fired to make them stronger.
© Science Museum / Science & Society Picture Library