Mylar
Mylar (a trade name in the US) is a polyethylene terephthalate polyester film used for its high tensile strength, transparency and electrical insulation. It is also known as Melinex (a trade name in the UK).
Its other common uses include:
- An overlay over map, on which additional data, or copied data, can be drawn without damaging the map
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One of its sides is slippery, the other side is microsopically rough.