Plastic is an almost meaningless word (at least with metal you can point to part of the periodic table ... until you have to deal with stuff like silicon.) The

Plastic is an almost meaningless word (at least with metal you can point to part of the periodic table ... until you have to deal with stuff like silicon.) The only shared property among plastic by definition is that it can be worked using some of the same processes. If you want to know anything else you have to pay attention to the particular material. ABS is not recyclable, PLA is extremely recyclable etc.