Tension History

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envelope sizes

History of Envelope Size Names

Learn how common envelopes got their name.
Tension building

Tension Corporation: A History of Ingenuity

Learn about our Kansas City headquarters, listed on the National Register of Historic Places.
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Tension's Secret Sauce: Our Associates

Tension's "secret sauce" hasn't changed for generations. Find out what's in it.

How Tension Got Its Name

Learn the story behind our company name.
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