| Micro
or "Invisible" Perforations
Midway
Engravers was the first to incorporate the "invisible"
perforation in engraved cutting tools. The demands
of clean edge perforating could only be done using
steel rule dies. Now irregular and complex shapes
can have all the aspects of an invisible perforation
in fully hardened, tool steel rotary dies. Perforations
up to 50 TPI are available.
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