I purchased these sheets in two different sizes/thicknesses, not to use for dry-point etching but as backing boards for watercolour. The strategy I use is to thoroughly wet the back of the paper with a wide hake brush, then lay it on the acrylic sheet before wetting the front. The wet paper clings to the acrylic surface naturally, so I don't have to use tape as you would if stretching the paper onto a wooden board, and the imperviousness of the plastic helps keep the paper damp longer for wet-in-wet techniques. Having several sheets means I can work on more than one painting at a time if I want. After doing some research, these proved to be the most economical way of purchasing acrylic sheets in the sizes I needed. I found the 2mm thick sheets a little more bendy than I'd prefer (the 2.7mm sheets were better) but they still did the job.
