Use of sodium carbonate and sodium polyacrylate for the prevention of vinegar syndrome |
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| Authors: | Daisuke Yamamoto Terumitsu Ishii Akira Hashimoto Kazunori Matsui |
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| Affiliation: | 1. Department of Conservation Science Technology, Ashigara Manufacturing Inc., Minamiashigara, Japan;2. Institute of Science and Technology, Kanto Gakuin University, Kanazawa-ku, Yokohama, Japan;3. College of Science and Engineering, Kanto Gakuin University, Kanazawa-ku, Yokohama, Japan |
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| Abstract: | To preserve archive films of which the base material is composed of cellulose acetate, we carried out screening tests on various reagents. We selected sodium carbonate and sodium polyacrylate as an acetic acid gas removing agent and a dehumidification agent, respectively. The performance of sodium carbonate per unit mass in the removal of acetic acid gas was superior to those of commercial products. The presence of sodium carbonate suppressed the increase in concentration of acetic acid gas for several months in film preservation containers. The neutralization of sodium carbonate with acetic acid gas was evaluated quantitatively. Sodium polyacrylate controlled relative humidity at around 40%RH in film preservation containers, and it was effective for film preservation. The dehumidifying performance of sodium polyacrylate compared favourably with those of commercial products. Thus, the materials tested in this study are found to be useful to avoid vinegar syndrome in cellulose acetate-based films. |
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| Keywords: | Vinegar syndrome sodium carbonate sodium polyacrylate cellulose acetate film film preservation |
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