YAĞLIBOYADA İNCELTİCİ MADDE OLARAK KULLANILAN SOĞUK SIKIM TOHUM YAĞLARININ BOYA KURUMA SÜRESİ VE RENK ÖZELLİKLERİNE ETKİSİ
EFFECTS OF COLD PRESSED SEED OILS USING AS MEDIUM IN OIL-PAINT ON DRYING TIME AND COLOR PROPERTY OF PAINTING

Summary/Abstract: Various fixed oils (refined and unrefined), namely drying oils or seed oils, are commonly used as medium in pictorial art and these oils are preferred by artists in order to dry and bind the color pigments in a canvas. The effects drying oils on characteristics (color change in time, required time for complete drying, constituents paint medium and cracking etc.) of paint vary depending on the fatty acid composition of the oil. However, studies about the effects of refined and cold press (unrefined) seed oils on aforementioned properties of paint are insufficient, thus in the present study, four different fixed oils (linseed, sunflowers, safflowers and sesame oils) were mixed with color pigments (white, red, yellow and blue) with the ratio of 1:10 (w/v) until getting a creamy structure and their effects on total drying time, color attributes (L*, a*, b*) were investigated. Moreover, fatty acid compositions (area %) of used drying oils are presented according to the GC/FID results. Color is the most important quality parameters of painting and slight changes may occur in the color of paint due part to type of drying oil. L*/a*/b* results of linseed, sunflower, sesame and safflower oils were range between in the following order; 45.3-97.85/-19.86-53.84/-36.36-88.44; 46.75-97.13/-17.84-54.31/-31.57-84.65; 44.97-97.16/-23.15-53.31/-35.79-86.16 and 45.30-96.95/- 21.97-53.19/-34.40-83.97, respectively. The longest drying time was found in sesame oil for white and yellow pigments while that of were almost similar for other oils. For red and blue pigments, drying time lasted longer for sunflower oil compared to others. With respect to fatty acid composition, SFA, MUFA and PUFA were determined at high ratio for sesame, sunflower, safflower and linseed oil, respectively. Thus, the study indicated that cold pressed safflower and linseed oils have a great potential in paintings due to shortest drying time and the ability of bringing out characteristic properties of each color compared to other cold pressed fixed seed oils as sesame and sunflower.

• Details
• Contents