Maybe you know this already, but it was news to me. You can print PLA directly on cold glass with some washable glue stick smeared on it. No curling, very strong bond and yet easily detachable with a razor. Better, cheaper and easier than painter’s tape.
http://www.enasco.com/prod/images/products/0F/AC085770.jpg
Somebody elsewhere was saying this will work with ABS on a heated bed?