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:
Envelopes with double-side-seams
Double-side-seam construction has vertical seams at both ends of
the envelope rather than diagonal seams. This style may be more
likely to wrinkle. Be sure the seam extends all the way to the corner of
the envelope as illustrated below.
Weight: The weight of the envelope paper should not exceed
), or jamming may 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 envelopes are not wrinkled, nicked, or
Sizes: From 90 by 160 mm (3.5 by 6.3 in.) to 178 by 254 mm (7
by 10 in.).
Guidelines for using paper 155