text: Conservation-restoration is the practice of cleaning and discovering the original state of an object, investigating the proper treatments and applying those treatments to restore the object to its original state without permanently altering the object, and then preserving the object to prevent further deterioration for generations to come (Caple, p. 5-6). It can involve many different people from various backgrounds to properly assess and treat an object, such as museum curators, conservators, scientists, and historians. The Metropolitan Museum of Art concludes that "conservators and scientists examine objects in the Museum's collections and those being considered for acquisition to determine their methods of manufacture and chemical compositions, as well as any damage or deterioration they may have undergone... conservators may then perform treatments, such as cleaning, repair, and restoration. They also recommend appropriate conditions for the storage, exhibition, and transportation of objects" (Pilosi and Wypyski, p. 66). Conservator-restorers can be found in museums, private for hire institutions, conservation associations, and government or state organizations. They not only treat glass objects, but also art, metal, ceramics, wood, and various other materials that are in need of preservation.