Glass disease, also referred to as sick glass or glass illness, is a degradation process of glass that can result in weeping, crizzling, spalling, cracking and fragmentation.[1][2] Glass disease is caused by an inherent instability in the chemical composition of the original glass formula.[3] Properties of a particular glass will vary with the type and proportions of silica, alkali and alkaline earth in its composition.[4] Once damage has occurred it is irreversible, but decay processes can be slowed by climate control to regulate surrounding temperature, humidity, and air flow.
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Swiftwas invoked but never defined (see the help page). - ^ Kunicki-Goldfinger, Jerzy J. (2008). "Unstable historic glass: symptoms, causes, mechanisms and conservation". Reviews in Conservation. 9: 47–60. Archived from the original on 10 September 2018. Retrieved 19 April 2018.
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