Even if the plastic you have isn’t labeled which type of plastic it is (though it should) there is ways to tell what type you have. Though the variety of possible plastic materials is essentially infinite, the familiar SPI recycling codes are the typical way to identify plastics. Knowing what plastics are used in other projects can help you find the plastic you are looking for in your own project.

The burn test, as it’s known, correlates a plastic sample’s composition with a set of observable properties including…
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