e/Glass disease

Information
has gloss	eng: Glass disease, also known as sick glass, is a degradation process encountered in art conservation. Glass disease is caused by an inherent fault in the chemical composition of the original glass formula. Usually, inadequate calcium oxide causes the alkalis in the glass to remain water soluble at a low level. Exposure to higher levels of relative humidity during storage or display causes these salts to hydrate and leach out of the glass. Upon a reduction of relative humidity, these hydrated salts can then form a crust on the surface. This process causes a complex disintegration of the glass which can be identified through a variety of symptoms. One such sign is the aforementioned crusty deposits which can form a visible hard alkaline coating on the surface. Another symptom is a distinctive network of fine cracking, also called crizzling, which can reduce the transparency of the glass or even threaten the integrity of the structure.
lexicalization	eng: Glass disease
instance of	(noun) things needed for doing or making something; "writing materials"; "useful teaching materials" material

Meaning
Danish
has gloss	dan: Glaspest dannes især i ældre glasvarer, der er fremstillet af glasformuleringer, som ikke tåler det stærkt basiske miljø i en opvaskemaskine. Under disse betingelser sker en ionbytning i glassets overflade, hvorved bl.a. calcium-ioner fjernes fra glasoverfladen og efterlader små revner/defekter. Dette fører i længden til mælkehvide "belægninger", der ikke kan fjernes (uanset hvilke produkter, der tilbydes på markedet). Glaspest smitter ikke fra glas til glas.
lexicalization	dan: Glaspest
Norwegian
has gloss	nor: Glasspest er endringer i glass eller krystall ved at en av komponentene i glasset, ofte alkali eller jordalkalioksider, over lengre tid segregeres og diffunderes til oversiden av glasset. Det framstår som hvite ringer eller urene skygger. I praksis lar glasspest seg ikke utbedre uten ved spesialbehandling på glassverk.
lexicalization	nor: Glasspest

Media
media:img	Crizzled glass.jpg
media:img	Glassdisease.jpg