National Envelope Corporation is among the largest envelope manufacturers in the world. The company offers a broad selection of envelope styles, sizes, weights, grades and tints. It features commodity, specialty, and home and office products, as well as custom printing. National Envelope's product line includes commercials, booklets, open-side specialties, catalogs, clasps and coins. The company offers solutions for medical imaging, CDs, presentations, certificates, prints and announcements. It also performs lithography and flexography processes. National Envelope Corporation was founded in 1952 and maintains manufacturing sites throughout the United States. The company has a location in City of Industry, Calif.