Hi everybody! I was wondering, what substances do form when plastic is heated? I found on the internet that if plastic is heated in the oven (not microwave) at 325°C, it shrinks and become more thick, and it can be used for art work. I tried to search about it, but I found different opinions about it and I don't know the scientific answer. Does it liberate toxic fumes? If yes, does it do it at what temperature? What if I color it with acrylic colors before putting it in the oven, is it even worse?