Cohorts
The group for students working together through the Painting Best Practices curriculum.
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Preparing Polyester Canvas
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Preparing Polyester Canvas
I am going to be preparing a large canvas support using polyester canvas. According to the Sizing and Ground course on the Webinar, the recommendation for canvas is: 1 coat GAC 400 (to stiffen fabric), then 2 coats GAC 100, then 2 coats oil ground.
Would this recommendation still apply for polyester canvas, or just applicable to linen and cotton canvases? If not, what would the best practice for polyester be?
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4 Replies
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The recommendation has changed, and we will be updating the course soon. Based on recent findings, Golden Artist Colors found that oil paint and oil grounds applied over acrylic polymers (without pigments) have a strong tendency to crack. We are now recommending VAE, PVA, or animal collagen glue as a size for canvas before applying an oil ground. Two coats of these sizes should be sufficient to provide stiffness and oil blocking for the oil ground. This recommendation also applies to polyester textiles.
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Awesome, thank you George.
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Would polyester canvas need to be saturated with tap water, as in the case of the linen, after stretching?
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If the canvas is 100% polyester, it may not need it because polyester has low moisture absorption. However, if it is a blend of fibers (usually cotton), it should be saturated.
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