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Step 2Determine shrinkage
One important thing to know when using polystyrene is that the different plastic containers do not always shrink to the same degree. Before you start cutting out the shape for your ID tag you will need to determine the amount of shrinkage. (I have also noticed that the length and width can shrink differently causing your final product to look skewed so it is a good idea to do a test run first.)
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.
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.
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