Active Archival Housing
| Main Authors: | , |
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| Format: | Article |
| Language: | English Slovak |
| Online Access: | http://www.viks.sk/chk/res_93_123_130.doc |
| Abstract: | SUMARRIES. W. J. Barrow was the first to identify an alkaline reserve as a main parameter of paper permanence. Subsequently, relevant compounds were not only incorporated into quality original-use paper but also into housing materials. Further development concentrated on the structure of such materials. On their porosity, and on specific activated carbon together with the alkaline compound. Recent tests have demonstrated a highly superior protection given by relevant housing materials. CONCLUSION. The formulations and fiber structures for the MicroChamberTM papers vary because there are conflicting tasks to be performed. The interior layers must readily accept, capture and neutralize deleterious by-products of deterioration that form as artifacts age, while the exterior layers must keep oxidative and ' Color photographic prints demonstrating the test results are available upon request from the authors. acid gases in the surrounding atmosphere at hay. To help achieve this, fiber selection and structure differs throughout the paper structure. Activated carbons can he selected that, when combined with alkaline buffers, are effective against many of the deleterious compounds we wish to capture and neutralize. For (he compounds against which activated carbon is not effective, we use a group of alkaline buffers in which pores and molecular cages sized to capture specific molecules have been fabricated. Traditional alkaline buffers must be used with both the activated carbon and the special buffers containing the molecular traps. MicrochamberTM papers are generally composed of multiple, non-laminated layers of paper, which are comprised of a variety of paper fibers, differentially processed and specifically selected to produce the maximum efficiency and performance in the MicroChamberTM paper. Within these layers are traditional alkaline buffers with either activated carbons and/or alkaline buffers specially modified with miniature interconnecting, multidimensional passageways (sized and shaped to accommodate specific molecules), leading to tiny molecular cages, where unwanted molecules of a deleterious nature are captured and neutralized. The efficacy of the various MicroChamherTM papers and boards is based on the interrelated functions performed by the structural components, molecular traps and neutralizing buffers together. We did test activated carbon used without alkaline buffers in conservation quality paper, and the performance was essentially identical to the performance of traditional lignin and sulfur-free alkaline buffered paper. |
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| ISSN: | ISSN 0034-5806 |
