Published: Jan 1972
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A common preliminary test applied to a pigment is mixing it into a paste with linseed oil. The test gives a rough idea of color and texture and, if done quantitatively, tells how much oil is needed to make a stiff paste. According to some authorities the oil absorption (OA) test predicts consistency of ready-mixed paint. Mills  writes “When equal volumes of paste (oil absorption paste) are thinned with equal volumes of thinners, the resulting paints have equal consistencies.” Stieg  shows that OA by the rubout method, expressed on a volume basis, is proportional to critical pigment volume, judged by uniformity of flat alkyd paints made with varying percentages of pigment, or determined by the Asbeck-Van Loo method.
Paper ID: STP37156S