Dr. Gibson’s • Conservation – practice of stabilizing and strengthening objects. Usually done by people with chemistry training. Conservators are employed by museums. • Restoration – practice of restoring objects to some semblance of their original condition. Usually done by people with art training. Restorers are usually hired by galleries/private parties. Ephemeral Art Permanency or longevity is not on most folk-artist’s minds. Mexican Paper-maché Devil Han Dynasty Urn Cover • Qing Dynasty cosmetic box with shell inlay Object’s Susceptibility to Damage Paper-maché Linares Sculpture Damage during transport due to poor loading Damage due to an artifact being left unattended in a vulnerable place Ceramics Most hand-made ceramics are low-fired and therefore soft, e.g. terra cotta. All ceramics are brittle. Mexican terra cotta ceramic sculpture. Broken by the instructor due to rough handling. Classical Period Mayan Cylindrical Vase Many ancient ceramic vessels owned by museums have been reconstructed and restored, and so can’t be treated as if they were solid modern pots. • Ancient Vietnamese terra cotta tile damaged due to poor storage conditions at the collector’s house. Should one use an adhesive, like museum wax, to prevent earthquake damage? Glazed and partially glazed Chinese ceramic vessels Ancient Metals 2000 year old Vietnamese bronze drum Damaged Vietnamese Dong Son bronzes restored by John Hirks. Bronze dagger damaged by mishandling by a student. Dong son bronze wristlet damaged due to delicacy and subpar packing. Wooden Buddha with copper alloy coatingflaking off. Paper 19th century family bibles Qing Dynasty scroll damaged after being left out on a cart in a high-traffic area. Textiles/Basketry • These are considered to be the most environmentally sensitive classes of objects. • The chief source of damage to textiles is light, but they are also prone to damage from handling, bugs, and pollution. • Most museums are reluctant to loan textiles, and if they do, it is usually for a short term: 5-6 months. They will also stipulate acceptable light levels. Wooden Objects Statute from Mali with powder post beetle infestation Wooden image of San Simon with termite infestation Dealing with bugs • • • • • Proactive measures Keep food, water from galleries and storage areas. Lay out traps to detect presence of bugs. Quarantine newly arrived organic objects from tropical areas in clear plastic bags. Quarantine all featherwork and paper maché objects. Treat food or woods to be used in an exhibit. Reactive Measures • Treat infestations by non-chemical means if possible. • Oxygen deprivation and freezing are the most common measures. • Objects must be subjected to treatments for lengthy periods and multiple times to catch bugs in all of their developmental stages. Plexiglass/Acrylic Acrylic case damaged by careless opening of packing by student Things to keep in mind about acrylic • It won’t expand – holes for screws must be drilled to size. • It is very soft – any abrasion will scratch it including being placed on a hard surface. • It deforms and melts when hot. It will swallow hot drill bits. • Ammonia acts as a solvent upon it – avoid Windex – type cleaners. Fine Art Packing • Art objects must be packed so that they are completely immobile. • Fragile objects cannot be packed together with heavy objects. Same with large and small. • Pack objects together in boxes only if you are absolutely certain that they will not adversely affect each other, including during the unpacking process. • If an object is very delicate or fragile, then it should be placed in a recess in a polyurethane foam block cut to the shape of the object. • Large, delicate objects have to be placed in custom-built wooden crates. Same is true for high-value objects. • A record must be kept of how objects were packed in such a crate so that they can be repacked in the exact same manner. Delicate high-value Mayan pots. Professionally-made crate