WESTERN STATES Open End Catalog Envelopes 6x9 28# White Self-Seal Box 500

Open End Catalog Envelopes

These open-end catalog envelopes measure 6 by 9 inches and use 28 lb white sulphite paper with a vellum finish. They are SFI certified and rated at 92 percent brightness for a clean, professional appearance. A center seam adds strength while the extended flap provides a larger sealing surface. Each box contains 500 envelopes and weighs 11.5 lbs.

Self-Sealing Latex Adhesive

The Pres-Stik latex adhesive creates a secure seal without moisture, replacing traditional gummed flaps that require wetting or separate tape. This speeds up high-volume mail preparation and eliminates the mess of dampeners or glue sticks. The jump is worth it when daily mailing volume makes manual sealing a bottleneck. Buyers who need tamper-evident security features or water-activated adhesion for archival requirements will not find those here.

Capacity and Headroom

A single box of 500 envelopes supports extended mailing runs for invoices, catalogues or promotional inserts without frequent reordering. The 28 lb stock handles multi-page documents and lightweight brochures while keeping postage costs predictable. It runs out when shipments exceed the 6 by 9 inch format or require padded protection for fragile items. Users sending oversized flats or heavy parcels will need a different enclosure.