Acrylic rings, 1930s-1960s.
© Science Museum / Science & Society Picture Library
Acrylic rings, 1930s-60s. Polymethylmethacrylate, known either as acrylic or by the trade name 'Perspex', was introduced just before World War II. Its transparency made it immediately useful for aircraft glazing. It became extremely popular in the 1960s for 'pop-art' jewellery.