- Most laser printers have feeding mechanisms designed for
single sheet applications. Envelopes are sheets of paper cut
and folded into multi-thicknesses. However, many sizes and styles
of envelopes are printed daily on various types of printers.
Each printer model may produce different results. Larger volume
models usually handle envelopes better than smaller desk-top
models. Commercial design envelopes are best suited for laser
applications.
- MOISTURE is the true
enemy of laser printers when running envelopes. Premature sealing
is caused by a moisture build-up inside the printer when heat
from the fusion chamber evaporates moisture in the paper and/or
the air.
- Envelopes have four thicknesses of paper, when specifying
paper a lower caliper paper (normally basis 24#) which is "laser
friendly" or "laser compatible" is best suitable.
- Commercial flap and diagonal seam envelopes perform the best.
- Value-added operations such as thermography, offset printing,
and embossing may affect the envelope feeding process.
- Since moisture (high humidity of 60% or higher) is an enemy
of laser printers, it is recommended that envelopes be stored
in a cool, dry location (40% to 50% relative humidity).
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