الفهرس 
NTRODUCTION ABOUT ORGANIC SOLVENTSOnly 14 pages are availabe for public view
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Abstract
This study aims to identify the physicochemical effects of organic solvents (Ethanol, Acetone, Toluene and Benzene) on painted layer during chemical cleaning in the conservation process.
In order to investigate this effect, we have used four organic solvents (Ethanol, Acetone, Toluene and Benzene) on mural painting simulated cubes covered with painted layer mixture of three binders (Arabic Gum-Animal Glue-Egg yolk) blended with (Hematite-Goethite-Gypsum-Malachite). Furthermore, we have identified and examined the results of treated samples by a range of complementary analytical techniques, such as FTIR analysis, Colorimetric measurements, and the Scanning Electron Microscope (SEM).
Consequently, the results have been divided into three parts depending on organic binder, and the interpretation has been included in the discussion, illustrating that solvent action varies with the polymeric structure of each binding medium. Moreover, the results of the FTIR have showed a change in wavenumbers and intensities of main absorption bands in samples after the addition of organic solvents especially the amides of the secondary structure of proteins in case of Animal glue and Egg yolk, and C-H and COO- groups in case of Arabic Gum. The surface Morphology by SEM of the treated samples confirms an increase in the roughness but fairly, even surface topography of the surface as the grains of the pigment become more evident and light-scattering than a saturated paint film.
Colorimetric measurements have showed a change in L, a, and b values of surface of the treated samples.