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Published: February 28, 2005, By Greg Zimmer, Zimmer Industries
Plastics may be flexible, brittle, or stretchable; thin, medium, or thick; clear to opaque; really easy to tear, easy to tear, tough to tear, or impossible to tear; have excellent "memory" or have no "memory"; react readily to heat or don’t react to heat at all; allow air to pass through them or actually prevent bullets from passing through them. You get the picture. So how do you cut, crease, and perforate such incredibly diverse (and perverse) materials