Easy Pet ID Tags

Step 3 Shrinking the polystyrene in the oven

• Put the plastic onto a piece of parchment paper and place into a toaster oven (use with good ventilation -eg. with kitchen fan on, open a window).
• Set the oven to 250 F (121C), and watch, first the plastic starts to curl, then it uncurls, then it shrinks .
• The time it takes can vary, but once it uncurls and stops doing anything interesting, it is done.
• With an oven mitt take out the parchment paper, if the plastic is still a bit curled, place something heavy on top, such as a phone book to straighten it out before it cools.