Seattle Envelope Corporation

4700 9th Ave NW
Seattle, WA 98107

Seattle Envelope Corporation (SEC) has been a leader in the envelope conversion industry since 1968, specializing in high-quality custom gummed and folded products. As a trade converter, SEC primarily serves commercial printers, print brokers, and fellow envelope manufacturers.

Committed to sustainable practices, SEC diligently works to minimize environmental impact and enhance resource efficiency in its manufacturing processes. The company continuously embraces advancements in technology to provide innovative solutions that benefit its clients.

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