- Hewlett-Packard LaserJet User Guide

ENWW Paper specifications 191
Envelopes
Envelope construction
Envelope construction is critical. Envelope fold lines can vary considerably, not only between
manufacturers, but also within a box from the same manufacturer. Successful printing on
envelopes depends upon the quality of the envelopes.
When selecting envelopes, consider the components listed below. Many envelope
manufacturers are now making envelopes optimized for laser printers.
Weight: The weight of the envelope paper should be 75 to 105 /m
2
(20to28lb), or
jamming might result.
Construction: Prior to printing, envelopes should lie flat with less than 6 mm (0.25 inch)
curl, and should not contain air. (Envelopes that trap air might cause problems.)
Condition: Make sure that envelopes are not wrinkled, nicked, or otherwise damaged.
Sizes in tray 1: Standard and custom sizes from 76 by 127 mm (3 by 5 inch) to
216 by 356 mm (8.5 by 14 inch).
Sizes in the optional envelope feeder: Standard sizes from Monarch (#7-3/
4) (98 by 191 mm, or 3.9 by 7.5 inch) to B5 (ISO) (176 by 250 mm, or 6.9 by 9.8 inch).
If you do not have an optional envelope feeder, always print envelopes from tray 1. (See
“Printing envelopes” on page 51.) To print envelopes with the optional envelope feeder, see
“Feeding envelopes automatically (optional envelope feeder)” on page 53. If envelopes curl, try
opening the rear output bin.
Envelopes with double-side-seams
Double-side-seam construction has vertical seams at both ends of the envelope rather than
diagonal seams. This style might be more likely to wrinkle unless properly constructed. Be sure
the seam extends all the way to the corner of the envelope.
Envelopes with adhesive strips or flaps
Envelopes with a peel-off adhesive strip or with more than one flap that folds over to seal must
use adhesives compatible with the heat and pressure in the printer. The extra flaps and strips
might cause wrinkling, creasing, or jams.
Envelope margins
The following table gives typical address margins for a Commercial #10 or DL envelope.
Note For the best print quality, position margins no closer than 15 mm (0.6 inch) from the edges of the
envelope.
Envelope storage
Proper storage of envelopes helps contribute to good print quality. Envelopes should be stored
flat. If air is trapped in an envelope, creating an air bubble, then the envelope might wrinkle
during printing.
Type of address Top margin Left margin
Return address 15 mm (0.6 inch) 15 mm (0.6 inch)
Delivery address 51 mm (2 inch) 89 mm (3.5 inch)