The Cellulose Ethers in Paper Conservation
| Main Authors: | , |
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| Format: | Article |
| Language: | English Slovak |
| ISSN: | ISSN 0034-5806 |
| Online Access: | http://www.viks.sk/chk/res_4_94_220_241.doc |
| Abstract: | Conclusions. This study was devoted to the use of aqueous solutions of cellulose derivatives as impregnation agents in the conservation of paper. Some properties of impregnated samples of standard paper were investigated depending on the type and concentration of the impregnation agents, and changes of the properties caused by accelerated ageing were also followed. The results show that, of all the tested cellulose ethers, the best agent for strengthening the paper base is Glutofix 100 (methylhydroxyethylcellulose). The concentration of aqueous solutions of these derivatives should be higher than 1%. The application of Tylose C 300 (carboxymethylcellulose) is less suitable, because it strengthens the paper base less effectively and also leads to a decrease in whiteness. The aqueous solution of Klucel M (hydroxypropylcellulose) had the weakest strengthening effect on paper; nevertheless, this derivative is interesting to conservators because of its solubility in some organic solvents. The derivatives investigated in this study showed no marked differences as regards their resistance against microbial attack. The cellulose ethers, though not preventing the growth either. The storage life of the stock solutions appeared to be limited, which implies that the aqueous solutions of cellulose ethers stored for several months should be protected by fungicides. It should be pointed out, in conclusion, that the results of this study apply only to the derivatives used in it (Tylose C 300, Tylose MH 300, Glutofix 100 and Klucel M) and they cannot be generally applied to all available types of carboxy-methylcellulose, methylhydroxyethylcellulose, hydroxypropylcellulose and methyl-cellulose. This means that, when commercially available cellulose ethers arc used in conservation work, it is absolutely necessary to carry out an exact determination of their physicomechanical, optical and biological properties. Summaries. Samples from chromatographic paper were impregnated in aqueous solutions of carboxymethylcellu-lose, methylhydroxyethylcellulose, hydroxypropylcellulosc and methylcellulose at various concentrations. One half of the impregnated samples was subjected to accelerated ageing. The changes of some mechanical, chemical, optical and biological properties were determined. |
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| ISSN: | ISSN 0034-5806 |
