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Box of 500 white vellum envelopes with poly window

WESTERN STATES

WESTERN STATES Poly Window Open Side Booklet Envelope 6" x 9" 24# White Side Seams Box of 500

SKU CH-WSX8-K3QEZ

White sulphite envelopes with a poly window hold A5 documents and seal with a remoistening flap in a 500-count box

  • SFI certified paper supports responsible forestry
  • 92 % brightness gives crisp print contrast
  • Vellum finish feels smooth for professional mailings
  • Side seam construction adds strength for bulky inserts
  • Box of 500 envelopes keeps high-volume jobs stocked

Ideal for Bulk Mailing Operations

These open side booklet envelopes measure 6" x 9" and come in a box of 500, making them suitable for high volume correspondence, invoices and direct mail campaigns. The poly window displays the recipient address clearly without manual addressing. White sulphite construction with SFI certification supports sustainable sourcing standards.

Vellum Finish Handles Cleanly

The 24# white sulphite stock delivers a smooth vellum finish that feeds reliably through laser and inkjet printers. Side seam construction provides structural integrity during automated insertion processes. At 11 lbs per box the weight is manageable for desk storage and mailroom handling.

Side Seam Design Maximises Internal Space

Two side seams under create a flat interior surface that accommodates folded documents, booklets or multi page inserts without centre seam interference. The remoistening seal offers a traditional secure closure. Each carton contains 2500 envelopes across five boxes for extended supply planning.

Highlights

  • SFI certified paper supports responsible forestry
  • 92 % brightness gives crisp print contrast
  • Vellum finish feels smooth for professional mailings
  • Side seam construction adds strength for bulky inserts
  • Box of 500 envelopes keeps high-volume jobs stocked

Specifications

BrandThe Envelope Supplies Shop

Questions about this item

How do I seal the remoistening flap without it sticking prematurely?

Lightly moisten the gummed flap with a damp sponge or envelope moistener, then press firmly; avoid over-wetting which can cause the 24# vellum paper to curl before mailing.

Will the poly window cloud or detach after long storage?

The poly window film is heat-sealed into the 24# sulphite stock and retains clarity for years in normal office conditions; no adhesive is used that could yellow or release.

At what fill weight do the side seams start to split?

The two side-seam construction handles typical booklet contents up to the 11 lb box weight per 500 envelopes; exceeding that with heavy inserts risks seam failure.

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