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Chapter – General Information 15
Envelope construction
Because of their construction, some envelopes will not feed through
the printer dependably. Observe the following guidelines when
purchasing and using envelopes:
l Make sure the envelope’s leading edge, which enters the printer
first, is straight, with a sharp, well-creased fold that has no more
than two thicknesses of paper. Envelopes that exceed 90 g/m
2
(24 lb) basis weight can cause jamming.
l Avoid using flimsy envelopes with thick or curved leading edges;
they will not feed reliably.
l Envelopes should lie flat and should not be wrinkled, nicked, or
otherwise damaged.
l Avoid envelopes with baggy construction; they might wrinkle
while going through the printer’s fuser assembly.
l Make sure that the adhesive labels used on envelopes will not
scorch, melt, offset, or release undesirable emissions when
heated to 205° C (401° F) for 0.1 second (0.2 second for HP
Color LaserJet printers).
l Avoid using envelopes with encapsulated adhesives that do not
require moistening, but rely instead on pressure to seal them.
l Do not use envelopes with clasps, snaps, tie strings, transparent
windows, holes, perforations, or cutouts.
l Do not use envelopes that have any adhesive surfaces exposed
to the printer.
l Finishes such as wove or smooth are recommended to ensure
good toner adhesion on envelopes.