Shrinky Dinks are a craft project for kids, that my kids have been doing all summer. Looked like a great way to make some bone swords, so I tried it out. The package says that they shrink 3x smaller, so I started by drawing a picture of the bone sword I wanted to copy, 3x larger. The Shrinky dinks we bought had 6, 8" x 10" sheets for $5-7. Great deal. We bought ours at Michael's, but I bet most kid craft stores would have them.
Next I copied the pattern onto the shrinky dink with a sharpy 2 times and cut them out.
You can see that the material is very thin, easy to trace and cut.
Next you cook it in the oven for three minutes on 325 F (163 C) on some paper so it doesn't stick to your pan.
While they are baking the plastic material folds as it shrinks and kinda looks like bacon. Mmmm. Bacon. It will flatten back out, but I found it helped to have some paper towel nearby to press it exactly flat once it was still warm. The first one was a little warped after it cooled and I put it back in for a couple of minutes and then flattened it out with a paper towel. At this point, I realized that it didn't shrink exactly to 1/3 the size, so I trimmed my second sword before I baked it. After the material is baked it is very brittle, so trimming wasn't the best idea. I chopped off some of the length of the baked sword, but couldn't make it skinnier without destroying it. Back to the drawing board.
You can see the one in the middle is a little thinner and a little shorter. I later trimmed the longer one, but may do it again for the perfect sword.
Here you can see the original drawing and the two new swords.
And Swarmy with some plasti-tac holding his swords on. I intend to use a dremel tool to sharpen the edges of the swords and put some green stuff on them to make them look a little more organic. Next time I want to do some Space Wolf icons for my tank doors and tops or make some custom shoulder pad icons for some space wolves.