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Box of 500 white 10 x 13 inch open side booklet envelopes with center seam and vellum finish

WESTERN STATES

WESTERN STATES Open Side Booklet Envelope 10 x 13 28# White Center Seam 500 Box

SKU CH-ZE0V-A8QJ7

Open-side booklet envelopes measuring 10 by 13 inches, 28 lb white sulphite paper with vellum finish and centre seam, 500 per box

  • Open-side format speeds bulk mailing insertion
  • 10 x 13 inch size fits standard booklet documents
  • 28 lb white sulphite stock resists tearing
  • 92 % brightness gives crisp professional look
  • SFI certified paper supports responsible forestry

Open-Side Booklet Envelope 10 x 13

These white sulphite envelopes measure 10 by 13 inches and feature an open-side design with a center seam. They arrive new in a box of 500 and carry SFI certification with 92 percent brightness and a vellum finish. The remoistening seal closes the flap securely for standard mailing tasks.

Simple Manual Sealing

Moisten the gummed flap by hand or with a desk moistener and press down to seal. The center-seam construction distributes stress evenly across the envelope body. The only common issue is insufficient moisture, which can leave the flap partially open during transit.

Consistent Through High-Volume Runs

The 28-pound paper stock resists tearing and curling when fed continuously through inserter machines or copiers. SFI-certified sulphite maintains its 92 percent brightness and vellum texture across the full 500-count box. Weight stays at 27 pounds per box from first piece to last.

Highlights

  • Open-side format speeds bulk mailing insertion
  • 10 x 13 inch size fits standard booklet documents
  • 28 lb white sulphite stock resists tearing
  • 92 % brightness gives crisp professional look
  • SFI certified paper supports responsible forestry

Specifications

BrandThe Envelope Supplies Shop

Questions about this item

How do I confirm the envelopes meet the 28# weight and 92% brightness after opening the box?

Check the carton label for the 28# basis weight and 92% brightness markings; the SFI certification and vellum finish are also printed on the box.

What comes inside the box and is anything else needed to seal them?

The box contains 500 open-side booklet envelopes with a centre seam and remoistening seal; no additional adhesive or inserts are required.

Which version should I choose if I need a 10 x 13 white envelope with a centre seam?

This single listing is the 10 x 13, 28#, white sulphite, centre-seam booklet envelope in a 500-count box; no other versions are offered here.

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