Why didn't my DIY shrinky dink work?

Question

I made a shrinky dink thing out of type 6 plastic. I set the oven to 350, and used aluminum foil exactly the way you are supposed to.

The only problem was that the plastic curled up on itself and two corners ended up sticking to each other. My thing came out kind of like a tube.

Any ideas why this happened?

Answer 1

Have no idea, perhaps this site will help

http://50.lycos.com/021306.asp