Mondo Knows Facts
Glass bottles pass through annealing lehrs to prevent shattering
Controlled slow cooling redistributes internal glass stress in freshly blown bottles
Freshly blown glass bottles and jars contain internal structural stresses that cause instant shattering if cooled too quickly. Manufacturers pass hot glassware through a long temperature-controlled oven called an annealing lehr. Controlled slow cooling redistributes molecular bonds and toughens the glass for everyday household use.
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Tags: glass, manufacture, materials
Glass bottles pass through annealing lehrs to prevent shattering: the short answers
- Where does this come from, and can I check it?
- Controlled slow cooling redistributes internal glass stress in freshly blown bottles. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
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