Poly, PETG, Acrylic? How to tell?
First, this is my first post to the forums. Hi. :)
I have a friend with a laser cutter, and he said that he can only cut Acrylic or PETG. No Polly.
First, why is that?
And second, I already have some plastic, so how can I tell what kind it is? I bought it a long time ago...
I'd rather not buy more plastic if I can help it, but I will if necessary.