The Degradation of Silk by Verdigris
| Hlavní autori: | , |
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| Médium: | Článok |
| Jazyk: | angličtina slovenčina |
| On-line prístup: | http://www.viks.sk/chk/res_1_95_45_63.doc |
| Abstrakt: | Summaries. Copper acetates are known to degrade paper and silk on ageing. A kinetic study of the rate of degradation of silk has been carried out using silk yarn and normal copper acetate. Tensile testing was used to monitor artificial ageing in a dry oven. The rate of degradation increased with the concentration of copper acetate, and temperature. An activation energy of 100 kj ˙ mol~' was obtained for silk degradation. Three conservation treatments were used to slow down the rate of degradation; magnesium bicarbonate solution was the most effective. Conclusions. The rate of degradation of silk by copper acetate (a type of verdigris) increased with compound concentration and temperature. An activation energy has been determined. Magnesium bicarbonate solution is a good inhibitor for the degradation. |
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| ISSN: | ISSN 0034-5806 |
