Epson EPL-N2700 Reference Manual page 28

Envelopes
Use the MP Tray to print on envelopes. The available envelope
sizes are as follows:
Monarch (3 7/8 × 7 1/2 inches)
Commercial 10 (4 1/8 × 9 1/2 inches)
DL (110 mm × 220 mm)
C5 (162 mm × 229 mm)
International B5 (176 mm × 250 mm)
Printing quality on envelopes may be irregular because different
parts of an envelope have different thicknesses. If the printing is
too light, adjust the print density using the printer driver or the
printer's control panel.
Note:
Because thickness and surface characteristics are especially important
for envelopes, test a sample for print quality and proper feeding before
you buy a large number of envelopes.
Colored paper
You can use colored paper as long as it meets the weight limits
shown in the paper specifications. Do not, however, use coated
paper (paper to which a clear or colored coating has been added).
Transparencies
You can use overhead projector transparencies and adhesive
drafting film if they are made for use with plain-paper copiers or
laser printers. Use the MP Tray to load these materials.
Printing with the EPL-N2700
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