With an open end, center seam construction, and heavily gummed flaps, the Catalog envelope's structure provides added support for large mailings. These envelopes are not to be used with inserting and sealing equipment or a laser printer.
Peel & Seal
In lieu of a gummed flap, the Peel & Seal Catalog has a release tape liner, which is placed on top of an adhesive. Once the tape liner is peeled off, the flap is to be pressed down to seal the envelope.