From what I understand, styrene, A.B.S., butyrate, vinyl, and acetate are the best plastics used for vacuum forming. Are there any others? Can you use acrylic like plexi-glass?
I was also wondering what objects are made of this type of plastics, lying around the house. I wanted to experiment a little with plastics I can find before purchasing large sheets. I have read that you can form your own sheets in the oven, but I am not sure which plastics to use.