34 Printer description EN
Envelope specifications
The table below summarizes the envelope specifications that provide the best performance.
Table 13. Envelope specifications
Property Specifications
Basis weight 64 g/m
2
to 105 g/m
2
(17 lb to 28 lb) typical.
See the user guide for specific printer and input limits.
Caliper (thickness) 0.09 mm to 0.14 mm (3.6 mil to 5.5 mil) typical single-layer
thickness.
Surface roughness 100 to 200 Sheffield.
Fusing compatibility All inks, adhesives, and other materials used in the
envelope construction must be compatible with the heat
and pressure of the fusing process. Materials must not
scorch, melt, ignite, offset materials, or release
undesirable emissions when heated to a temperature
between 175° to 230° C (347° to 446° F) for 0.1 second.
Dimensional accuracy
and construction quality
!
Envelopes must be folded within ±1.0 mm (±0.04 inch)
of nominal size with no more than two thickness of
paper anywhere along the leading edge.
!
All folds must be sharply creased and construction
must be tight (not baggy) to avoid wrinkling.
!
Envelopes must not be stuck together from excess
seam adhesive (blocking).
!
The flap must be flat within 1.5 mm (0.059 in) over the
width where adhesive is applied.
Curl Envelopes must lie flat, with no more than 6 mm (0.25
inch) curl across the entire surface.
Adhesive flap curl Envelope flap should be flat, with 1.5 mm (0.059 inch)
over the width where adhesive is applied.
Moisture content 4 percent to 6 percent by weight.
Grain Different envelope constructions might require different
grain orientations for best performance, which is left to the
discretion of the manufacturer.
Packaging Envelopes should be contained in a protective box to
prevent edge damage and maintain flatness.
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