Printing On Special Media; Envelopes - Epson EPL-N3000 Reference Manual

Printing on Special Media

You can print on special paper stock such as thick paper,
envelopes, transparencies, and labels.
Note:
Since the quality of any particular brand or type of media may be changed
by the manufacturer at any time, EPSON cannot guarantee the quality
of any type of media. Always test samples of media stock before
purchasing large quantities or printing large jobs.

Envelopes

The print quality of envelopes may be irregular because different
parts of an envelope have different thicknesses. Print one or two
envelopes to check the print quality.
Caution:
c
Do not use window envelopes unless they are specifically
designed for laser printers. The plastic on most window envelopes
will melt when it comes into contact with the fuser.
Note:
Depending on the quality of envelopes, the printing environment,
or the printing procedure, envelopes might be wrinkled. Make a trial
print run before you print on a lot of envelopes.
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Paper Handling