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<p>[QUOTE="verybrad, post: 138915, member: 37"]I think between you two, you've summed it up pretty well. Oils and acrylics can be hard to differentiate. There are additives to both that can change the characteristics in how they go on and how they dry. In general, acrylics tend not to blend with one another when painting wet on wet. The same look can be achieved with oils if there is sufficient drying time between colors. Acrylics tend to dull fairly quickly and chalk eventually if not varnished. Oils hold their color and sheen better over time. Acrylics, in general, lend themselves to the very heavy impasto effects. I think the small painting of the house is probably acrylic. The other one could be either. </p><p><br /></p><p>Watercolors are translucent, go on thinly, and tend to spread out in to the paper. Gouache and tempera, while also watercolor, are thicker and tend to stay put when painted. These three are used almost exclusively on paper. Seldom do you see oils used on paper but you will occasionally see acrylics. </p><p><br /></p><p>Modern works tend to be done in acrylics, though many artists still use oils. I am not sure when acrylics became widely available but truly old works on canvas or board are, of course, oils. While it is nice to know what you have, I am not so sure that it is all that important otherwise. The medium tends to be secondary to the merit of the work.[/QUOTE]</p><p><br /></p>
[QUOTE="verybrad, post: 138915, member: 37"]I think between you two, you've summed it up pretty well. Oils and acrylics can be hard to differentiate. There are additives to both that can change the characteristics in how they go on and how they dry. In general, acrylics tend not to blend with one another when painting wet on wet. The same look can be achieved with oils if there is sufficient drying time between colors. Acrylics tend to dull fairly quickly and chalk eventually if not varnished. Oils hold their color and sheen better over time. Acrylics, in general, lend themselves to the very heavy impasto effects. I think the small painting of the house is probably acrylic. The other one could be either. Watercolors are translucent, go on thinly, and tend to spread out in to the paper. Gouache and tempera, while also watercolor, are thicker and tend to stay put when painted. These three are used almost exclusively on paper. Seldom do you see oils used on paper but you will occasionally see acrylics. Modern works tend to be done in acrylics, though many artists still use oils. I am not sure when acrylics became widely available but truly old works on canvas or board are, of course, oils. While it is nice to know what you have, I am not so sure that it is all that important otherwise. The medium tends to be secondary to the merit of the work.[/QUOTE]
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