• Use envelopes that can withstand temperatures of 180°C (356°F) without sealing,
excessive curling, wrinkling, or releasing hazardous emissions. If you have any doubts
about the envelopes you are considering using, check with the envelope supplier.
• Adjust the width guide to fit the width of the envelopes.
• Load an envelope with the flap side down and with the stamp area on the top left side.
The end of the envelope with the stamp area enters the MPF first.
See "Using the MPF (Multi purpose feeder)" for instructions on loading an envelope.
NOTE: You can improve the printing quality of envelopes by pulling down the
rear door to open and pushing the two blue pressure levers down. This
instruction will be especially helpful for DL and C5 size envelopes.
A combination of high humidity (over 60%) and the high printing temperatures may
seal the envelopes.