I have some Plaskolite 3/16" clear acrylic that has an odd masking on it called "TG Masking". It's vaguely paper-like, but with a smooth outer layer, sort of like resin-coated photo paper. Any clue what it's actually made of, i.e. safe to laser? (Not having any luck getting an answer back from Plaskolite.)

I'd like to avoid peeling it off and replacing it with transfer paper if possible: there's a lot of it and I already killed most of an afternoon doing that with some other sheets that had that nasty blue poly masking.