Funny anecdote. I was just talking to the postdoc in my group. I noticed a sheet of Polaroid packfilm on his desk with funny looking circles. Turns out he was using it to align the ruby laser system we have. I asked him if he was just using scraps lying around (we have a LOT of old stuff lying around) and he said no. He actually likes using Polaroid film more than burn paper because you can see more of the structure of the laser pattern. In fact, one of the researchers on another project at the lab just put in an order for more film for this express purpose. I doubt they use *that* much of it though.