I want to do some monoprinting with my kids this year. I've done it on
Plexiglas myself, but it's so expensive! Does anyone have experience
with something called "Plastic Drypoint plates?" They are with the
printing supplies in the Sax catalog, but I don't know what they are
like. Are they similar to Plexiglas or are they more like plastic
overhead transparency sheets (which I've used for monoprints, but was
not happy).