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Jia-sun Tsang, a conservator at the Smithsonian Museum Conservation Institute, studies a set of 49 plastic samples from a 1920s Lumarith salesman’s kit in the collection of the Smithsonian’s National Museum of American History. Some of these samples, made from a type of plastic called cellulose acetate, are visibly deteriorating. Tsang and her colleagues are working to slow or mitigate the deterioration of the many plastic objects in museum collections, as well as stem the damage to other objects caused by gases emitted by deteriorating plastic.(Photo by Donald Hurlbert) |
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