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The group for students working together through the Painting Best Practices curriculum.
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Oleogel
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Oleogel
George, just read your latest fat/lean article. Great stuff but I have one question: Would “Oleogel” be considered a “paste” type medium? Wondering since it’s a bit thixotropic.
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4 Replies
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That’s a good question, Jan. Oleogel is not a paste medium. It is a gel medium. What distinguishes paste mediums from gel and liquid mediums is that they do not contain any pigments or extender pigments (fillers). Although Oleogel contains fumed silica, fumed silica is not an extender pigment, but rather an additive, since it does not provide sufficient solids to affect the pigment volume concentration (PVC).
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Thanks.
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Just to clarify my understanding. That means that adding oleo gel (gel mixture) would decrease the PVC of an oil paint mixture. Whereas a paste mixture ( mixture containing pigment solids) would keep the PVC of a paint mixture relatively the same. Do I have that correct?
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Adding Oleogel (or oil) to paint decreases the PVC of an oil paint mixture since it reduces the pigment volume in the mixture. In comparison, paste mediums (mixtures containing pigment solids) maintain the PVC of the oil paint mixture close to its original PVC since it adds pigment and binder.
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