
3 0 c m
40cm
actual image size: 32cm x 22cm
Description
Glas is made by melting a mixture of various inorganic substances, principally purified sand (silica), and cooling the melt under controlled conditions to prevent crystallisation. Cullet is broken-up waste glas which is added to the original mixture at the beginning of the proces.
Image Details
Image Ref.
10305077
© Science Museum / Science & Society Picture Library