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 following components:
●
Weight: The weight of the envelope paper should not exceed
28 lb (105 g/m
2
), or jamming might result.
●
Construction: Prior to printing, envelopes should lie flat with
less than 6 mm (0.25 in.) curl and should not contain air.
Envelopes that trap air may cause problems.
●
Condition: Make sure that the envelopes are not wrinkled,
nicked, or otherwise damaged.
●
Sizes: From 90 x 160 mm (3.5 x 6.3 in.) to 178 x 254 mm
(7 x 10 in.).
Envelopes with double-side seams
An envelope with 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. Make sure that the
seam extends all the way to the corner of the envelope as shown
in the following illustration:
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: 200° C (392° F). The extra
flaps and strips might cause wrinkling, creasing, or jams.
Acceptable
Unacceptable
EN
Guidelines for using media 243
Envelope storage
Proper storage of envelopes contributes to good print quality. You
should store envelopes flat. If air is trapped in an envelope,
creating an air bubble, the envelope might wrinkle during printing.