Hydroxypropyl Cellulose and Polyvinyl Alcohol on Paper as Fixatives for Pigments and Dyes
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| Format: | Article |
| Language: | English Slovak |
| ISSN: | ISSN 0034-5806 |
| Online Access: | http://www.viks.sk/chk/res_4_96_238_251.doc |
| Abstract: | Conclusions. The main goal of this experimental work was to establish whether Klucel G could be applied in the conservative restoration of graphic works of art, without inducing chemical deterioration of the cellulose polymer chain and without changing the aesthetics of the pigments. A further aim was to study the possible employment of a non-conventional water-ethanol solution of PVA1 for the protection of pigments.27 All experimental data point to the fact that neither polymer is damaging to the cellulose and furthermore that they exert protection against chemical deterioration. Optical measurements showed that Klucel G and PVA1 did not signficantly alter the colours of the pigments to which they were applied. The measured changes of brightness, in fact, disappeared after a few days' ageing. Other tests on the effectiveness of the fixing were carried out by immersing the protected pigments in water and in a deacidification solution. During and after the baths all pigments were stable and still remain so. The ethanol solution of the adhesives also has a further use in the treatment of tracing paper, which cannot be restored by using water solutions. Summaries. The aim of this experiment was to find (semi-)synthetic adhesives for the restoration of graphic works of art, thus permitting the fixation of pigments without damaging the paper or changing the quality of the visual effect of all the colours. We decided to investigate the possibility of employing of a hydroxypropyl cellulose (Klucel G) and a polyvinyl alcohol of low molecular weight (Unitika Poval UP-050), the former in an alcohol solution and the latter in a water-alcohol solution. All experimental data point to the fact that neither polymer is damaging to the cellulose and furthermore that they exert protection against chemical deterioration. Optical measurements show that Klucel G and PVA1 do not alter the colours of the pigments to which they are applied. Other tests on the effectiveness of the fixing were carried out by immersion of the protected pigments in water and in a deacidification solution. During and after the baths all pigments were stable and still remain so. |
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| ISSN: | ISSN 0034-5806 |
