WESTERN STATES 10x13 Expansion Catalog Envelope 40# Kraft 250 Box

10 x 13 Expansion Catalog Envelope

This 10 by 13 inch open-end envelope uses 40-pound kraft paper with a two-inch expansion gusset so it holds bulky catalogs, reports or sample sets without tearing. The pressure-sensitive Kwik-Tak seal closes instantly without moisture, and the center seam keeps contents aligned during handling. Each box contains 250 envelopes and weighs 26 pounds, making it a practical choice for mailrooms that ship high volumes of thick documents.

SFI Certified Kraft with Vellum Finish

The paper carries SFI certification and features a vellum finish that resists smudging while accepting pen, stamp or label ink cleanly. A green diamond border and pre-printed "First Class Mail" text on the face eliminate the need for separate postage markings, speeding up outbound processing. Roptex construction adds tear resistance at stress points, so the envelope survives automated sorting equipment without splitting.

Pressure-Sensitive Seal and Open-End Limits

The Kwik-Tak adhesive activates with finger pressure alone, but it is not designed for repeated opening and closing; once sealed the flap stays shut unless torn. Open-end orientation means the flap is on the short 10-inch side, so very wide inserts must be fed carefully to avoid corner catching. The 40-pound stock provides stiffness but is not waterproof, so contents needing moisture protection should be bagged first.