Protection from light damage
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| Format: | Article |
| Language: | English Slovak |
| ISBN: | ISBN 0-963-4685-2-9 |
| Online Access: | http://www.viks.sk/chk/plam_99_99_109.doc |
| Abstract: | SUMMARIES. Light is a common cause of damage to library and archival collections. Paper, bindings, and media (inks, photographic emulsions, dyes, and pigments, and many other materials used to create words and images) are particularly sensitive to light. Light damage manifests itself in many ways. Light can cause paper to bleach, yellow, or darken, and it can weaken and embrittle the cellulose fibers that make up paper. It can cause media and dyes used in documents, photographs, and art works to fade or change color. Most of us recognize fading as a form of light damage, but this is only a superficial indication of deterioration that extends to the physical and chemical structure of collections. Light provides energy to fuel the chemical reactions that produce deterioration. While most people know that ultraviolet (UV) light is destructive, it is important to remember that all light causes damage. Light damage is cumulative and irreversible. CONCLUSION. All light contributes to the deterioration of library and archival collections by providing energy to fuel destructive chemical reactions within the paper. Light also damages bindings, photographic emulsions, and other media, including the inks, dyes, and pigments used in many library and archival materials. Institutions should follow the guidelines given above for measurement of light levels and control of light exposure. All sources of ultraviolet light illuminating collections should be filtered, and the exposure of collections to visible light should be strictly controlled. |
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| ISBN: | ISBN 0-963-4685-2-9 |
