Celiuliozės eterių panaudojimas konservuojant tapybą ant tekstilinio pagrindo

ENThe article presents the twelve year’s experience in research and practical work on applying cellulose ethers for relining of paintings on canvas. In 2003 the Restoration Centre specialists investigated properties of eight cellulose ethers - methyl cellulose, methyl-hydroxyethyl cellulose, hydroxypropyl cellulose and sodium carboxymethylcellulose of different polymerization degree and different molecular weight under photochemical ageing. The results showed, that cellulose ethers chemical and optical properties change slightly, after ageing cellulose ethers remain soluble. In further research cellulose ethers was tested as lining adhesive. Experiments have been carried out with samples imitating of lined painting on canvas; measured aqueous extract of adhesives acidity pH, determined stiffness and adhesion between lined canvases. Some of the samples were artificially aged photochemically, others - in the environment of variable temperature and relative humidity The results of research showed that sodium carboxymethylcellulose, methyl-hydroxyethyl cellulose Tylose MH1000, hydroxypropyl cellulose Klucel G are suitable and effective as adhesive for painting lining.The lined canvas is 2-3 times more elastic than lined with traditional sturgeon glue, the lining is carried out without heat and it remains easily reversible. Moreover, cellulose ethers can be used in other conservation process: cleaning of painting back, reducing of canvas acidity, for consolidation of canvas and for consolidation of paint layer in case matted surface must be preserved. Cellulose esters use practices illustrated by two large-format paintings conservation examples.