Shatter pattern of toughened glass

Made:
1968

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Science Museum Group Collection
© The Board of Trustees of the Science Museum, London

Shatter pattern of toughened glass, 1968. Toughened glass is safety glass formed by putting the surface into a state of compression. There are two ways of doing this. Thermal toughening chills the surface, which is close to the softening point, with air jets. Chemical toughening exchanges sodium ions in the surface with larger ones thereby setting up internal stresses.

Details

Category:
Glass Technology
Object Number:
1968-155
type:
toughened glass
credit:
Pilkington Bros.