There are two things that my laser manufacturer specifically say not to laser - pvc and teflon. Both emit very hazardous gasses and can do harm to you and the machinery. PVC emits chlorine gas when burned, lasered, and that mixes with the moisture in the air resulting in hydrochloric acid - nasty stuff. As said previously, it probably won't do immediate damage but you don't want to be exposed to it for too long. It also is very corrosive, lasers can be destroyed from periodic exposure. I won't laser anything that I can't verify is not pvc.
Gary |