Step 1: What you will need:
- Polystyrene plastic (#6 plastic or PS )* -it is the clear plastic often used in takeout containers (not the foam).
- Metal hoop to attach tag to collar
- Parchment paper
- Coloured markers and a black fine tip marker
- Hole punch
- Toaster oven and oven mitts
Step 2: Determine shrinkage
To determine the amount of shrinkage cut a small piece of the plastic, measure it (length and width), shrink it in oven (see Step 3) and then measure the end product.
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.
Step 4: Preparing the tag
Once you have determined the size of the plastic that you will need, cut it out. I cut a basic rectangle shape with rounded edges, but you can try different shapes such as circles, hearts, a dog bone, fish, fire hydrants etc, as long as there is enough room to write the information on.
If you are using clear plastic it is a good idea to sand the plastic so it becomes opaque making it easier to read the information. A medium grit will do and sand evenly over the whole surface. If you are buying shrink art sheets you can get opaque ones (and in different colours too).
I just use a standard hole punch to make a hole in the top middle of the tag, double check with the measurements in step 2 that the hole will be large enough after it has shrunk to place the hoop through.
Step 5: Add colour, name, contact information, and decorate
On a couple of the tags that I experimented with I coloured the background, this looks really nice and stands out when placed on a white (and ginger) cat, but upon shrinking the colour darkens considerably making the writing more difficult to read. So I would recommend using lighter colours or leaving it white.
Name and contact information
The information you put on the tag is discretionary, the important thing is that someone will be able to contact you if they find your pet. The pet's name and your phone number(s) are probably the most important, you can also put on your address, and the pets medical information (if relevant) or even your own name. Write clearly and use a fine tipped marker to ensure that the information is legible after it has shrunk.
Add embellishment if you would like. I drew hearts and flowers, fish or dog bones would be cute too (if your into cute).
Step 6: Shrink the ID tag,
Once it has cooled place the hoop through the hole and put it on your pet's collar.