ES3640e MFP Printing Guide - 29
Duplex (double-sided) printing
If your printer has a duplex unit installed you can print on both
sides of the paper, to save paper, weight, bulk and cost.
> Only paper can be used for duplex printing, not
transparencies or other media.
> Use paper stock of 75–120 g/m². If you experience
excessive curling with 75–90 g/m² paper, use 105 g/m².
> Use standard sized paper stock only, e.g. A4, A3, Letter,
etc.
> Load the paper print side up. Ream wrappers are usually
marked with an arrow, indicating which is the print side.
> Paper can be fed from standard paper trays, including the
high capacity feeder if you have one, but not from the
multipurpose tray.
> Do not set the paper weight to Ultra Heavy.
> Do not enable the White Page Skip function.
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