Hi Richard, and welcome to the Forum!
I found your link very interesting and I'm going to check this out with some of my technically astute artist friends. I found the claim that this ground resists UVA damage to be especially interesting.
There is some discussion on the Forum about ABS painting grounds (ABS = acrylonitritile, butadiene and styrene) but I'm going to ask Chuck if he can come on and explain how this differs from the polyvinyl polymer resins (containing calcium carbonate and titanium dioxide) found in these Solid Ground products. I'm personally interested in all archieval studies performed on plastic grounds.
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