Conservation of In-Situ and Post-Excavation Glass - Stephen Koob скачать в хорошем качестве

Conservation of In-Situ and Post-Excavation Glass - Stephen Koob

Stephen Koob Chief Conservator Emeritus of The Corning Museum of Glass Friday, March 12th, 2021 Archaeological glass encompasses glass that has been buried, either in the ground or in fresh or salt water. In some cases glass was intentionally buried as grave gifts and can be found in archaeological cemeteries or tombs. Most glasses in museum and private collections do not have provenances and their place of manufacture or origin is unknown, or only known by comparison with actual excavated sources. Archaeological glasses can be preserved in many various states. In some cases the glass has not changed at all, or very little since manufacture, in other cases the glass may be heavily deteriorated and extremely fragile. Archaeologists, excavation personnel, volunteers and conservators who will be responsible for handling glass should be familiar with the proper procedures, materials and techniques that are used in the lifting, handling, packing, transportation and storage of glass vessels and fragments. Severely deteriorated or “weathered” layers on archaeological glasses are extremely sensitive to touch, and should be handled as little as possible.In general, excavated archaeological glasses should be kept dry if found dry; wet, if found wet (underwater retrieval); or damp, if found damp; until careful examination is possible and time is available for treatment.Safe retrieval is a priority.Treatment can involve simple cleaning, or not; consolidation of fragile or lifting surfaces, and possible reassembly using the adhesive Paraloid B-72. The eventual disposition of an object, or group of objects, should be considered before any intervention is carried out whether the object is to be housed in storage, studied, published, or placed on display. Assembled objects also often require a significantly larger storage space (shelving or cabinets) than individual fragments, which can be bagged or placed in drawers. Restoration beyond this is rarely done in the field, but may be done in a museum.