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White poly-window booklet envelopes, box of 500

Western States Envelope & Label

Western States Envelope & Label Poly Window Booklet Envelopes 6x9 24# White Box 500

SKU CH-9MHD-AB6VA

White sulphite booklet envelopes with a poly window, 92 % brightness, vellum finish and side seams, 500 per box

  • SFI-certified paper supports responsible forestry
  • 92% brightness ensures crisp, readable addresses
  • Vellum finish gives a smooth, professional feel
  • Side-seam construction adds strength for mailing
  • Box of 500 envelopes keeps high-volume jobs supplied

Poly Window Booklet Envelopes

These white sulphite booklet envelopes measure 6 x 9 inches and feature a poly window positioned 7/8 inch from the left edge and 2-3/8 inch from the bottom. They are designed for offices and organisations that mail statements, invoices or direct-mail pieces requiring a visible address block. The 24 lb stock provides a professional feel for routine correspondence.

Open Side Side Seam Construction

The open side format with two side seams under allows the envelope to lie flat during insertion, which speeds up both hand-stuffing and machine inserting workflows. A remoistening seal on the flap down closure secures contents without the need for tape or adhesive labels. Each box contains 500 envelopes, and a master carton holds 2500 units for high-volume mailrooms.

SFI Certified 92 Brightness Vellum Finish

The Western Sulphite paper carries SFI certification and delivers 92% brightness with a vellum finish that resists show-through during extended handling. The 11 lb box weight reflects a substantial paper caliper that maintains rigidity through postal sorting equipment. Buyers needing a larger window area or a different paper colour will need an alternative specification.

Highlights

  • SFI-certified paper supports responsible forestry
  • 92% brightness ensures crisp, readable addresses
  • Vellum finish gives a smooth, professional feel
  • Side-seam construction adds strength for mailing
  • Box of 500 envelopes keeps high-volume jobs supplied

Specifications

BrandThe Envelope Supplies Shop

Questions about this item

What is the paper weight of these envelopes and how does it hold up to daily mailing?

The envelopes use 24 lb White Sulphite paper with a Vellum finish, giving enough stiffness for automated inserting equipment while staying light enough for standard postage rates.

Do the envelopes generate static or heat when run through a high-volume inserter all day?

The Vellum finish on SFI certified sulphite stock resists static buildup and feeds cleanly through continuous inserter cycles without curling or jamming.

What sealing method do these use and do I need a separate moistener?

Each envelope has a remoistening seal on the flap; simply apply water or run through a standard envelope moistener — no extra adhesive or tape is required.

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