How flexible are the PVA. Your method is exactly the way they made Gesso (plaster) back in the day for wooden panels except for the glue. Which I know are a very good replacement. But how will it work on stretched canvas? For an acrylic based gesso you would need an acrylic resin as a Binder. Its more flexible right. I was thinking what the difference between the PVA are compared to the resin.
I know this is a really late reply but I'll try to answer your question as best as possible in case anybody else comes along having the same question in the future. So first off if I understand your question correctly you're asking if this is used on stretched canvas? The answer is most definitely, especially if using oil paint. The main reason PVA(polyvinyl acetate) or RSG(rabbit skin glue) are used, is as a sizing for raw linen or canvas this is done by applying a layer to the back and at times to the front as well. This creates a seal that prevents the oil from bleeding through as gesso is normally absorbent in nature. Another use of this sizing is as an adhesive, to adhere the canvas to boards. You also asked if it were flexible? Well most surfaces that are to be used for oil painting on, call for rigid supports whether that comes from canvas stretched tightly on stretcher bars, wooden panels, mdf boards, copper sheets or aluminum composite materials. Oil painting all call for rigid supports to help maintain the painting from cracking. As well as a sizing and a good ground layer to protect against delamination(sp?). But thats a whole other topic in and of itself entirely. Hope this helps you or anyone in the future!
How flexible are the PVA. Your method is exactly the way they made Gesso (plaster) back in the day for wooden panels except for the glue. Which I know are a very good replacement. But how will it work on stretched canvas?
For an acrylic based gesso you would need an acrylic resin as a Binder. Its more flexible right. I was thinking what the difference between the PVA are compared to the resin.
I know this is a really late reply but I'll try to answer your question as best as possible in case anybody else comes along having the same question in the future.
So first off if I understand your question correctly you're asking if this is used on stretched canvas?
The answer is most definitely, especially if using oil paint. The main reason PVA(polyvinyl acetate) or RSG(rabbit skin glue) are used, is as a sizing for raw linen or canvas this is done by applying a layer to the back and at times to the front as well. This creates a seal that prevents the oil from bleeding through as gesso is normally absorbent in nature. Another use of this sizing is as an adhesive, to adhere the canvas to boards.
You also asked if it were flexible? Well most surfaces that are to be used for oil painting on, call for rigid supports whether that comes from canvas stretched tightly on stretcher bars, wooden panels, mdf boards, copper sheets or aluminum composite materials. Oil painting all call for rigid supports to help maintain the painting from cracking. As well as a sizing and a good ground layer to protect against delamination(sp?).
But thats a whole other topic in and of itself entirely.
Hope this helps you or anyone in the future!