WESTERN STATES Open End Catalog Envelopes 9.5 x 12.5 28# White Self-Sealing Flaps Extended Box 500

White Sulphite Catalog Envelopes

These open-end catalog envelopes measure 9.5 by 12.5 inches and use 28# white sulphite paper with a vellum finish. The stock is SFI certified and rated at 92% brightness for a clean, professional appearance. Each box contains 500 envelopes and weighs 24.5 lbs. They are suited for offices, mailrooms and fulfilment operations that ship flat documents, catalogues or literature on a regular basis.

Self-Sealing Flaps and Extended Design

A Pres-Stik latex adhesive on the extended flap creates an instant bond without moisture, speeding up high-volume packing lines. The centre-seam construction keeps the front panel flat for clean label adhesion and easy addressing. No window is present, so the full face is available for printed or handwritten addresses. The extended flap also allows the envelopes to be stacked neatly in trays or hoppers for automated feeding equipment.

Sustained Mailroom Performance

The 28# sulphite stock resists tearing during repeated handling and long transit routes, keeping contents secure over extended shipping cycles. Adhesive integrity holds firm across temperature and humidity variations typical in warehouse environments. Brightness and finish remain consistent across the full 500-count box, preventing feed jams or print-quality issues during long print-and-mail runs. Users needing padded protection or rigid mailers for heavy items will need a different product type.