Lexmark X644e User Manual

The MFP can print directly on transparencies designed for use in laser printers. Print quality and durability depend on the 
transparency used. Always print samples on the transparencies you are considering before buying large quantities. 

The Paper Type setting should be set to Transparency to help prevent jams. In Macintosh, be sure to set the Paper Type to 
Transparency in the Print dialog on the Imaging choice in the Copies & Pages pop-up menu. 

Use transparencies designed specifically for laser printers. Check with the manufacturer or vendor to determine whether 
your transparencies are compatible with laser printers that heat transparencies to 230°C (446°F). Use only transparencies 
that are able to withstand these temperatures without melting, discoloring, offsetting, or releasing hazardous emissions. For 
detailed information, see the 

, which is available on the Lexmark Web site at 

Transparencies can be fed automatically from the multipurpose feeder and all standard and optional trays, except the 2000-
sheet drawer. Before loading transparencies, fan the stack to prevent sheets from sticking together.

Be careful when you handle transparencies. Fingerprints on the surface of the transparency cause poor print quality.

You can load up to 10 envelopes in the multipurpose feeder and 85 envelopes in the envelope feeder. Try a sample of any 
envelopes you are considering using with the MFP before buying large quantities. See 

and

 for instructions on loading envelopes.

When printing on envelopes:

To achieve the best possible print quality, use only high-quality envelopes that are designed for use in laser 
printers.

Set the Paper Size/Type in the Paper menu to MP Feeder, Manual Env, or Env Feeder depending on the source 
you are using. Set the paper type to Envelope, and select the correct envelope size from the control panel, the 
MFP driver, or from MarkVision™.

For best performance, use envelopes made from 75 g/m

2

 (20 lb bond) paper. You can use up to 105 g/m

2

 (28 lb 

bond) weight for the multipurpose feeder or 105 g/m

2

 (28 lb bond) weight for the envelope feeder as long as the 

cotton content is 25% or less. Envelopes with 100% cotton content must not exceed 90 g/m

2 

(24 lb bond) weight.

Use only new, undamaged envelopes.

For best performance and to minimize jams, do not use envelopes that:

Have excessive curl or twist.

Are stuck together or damaged in any way.

Contain windows, holes, perforations, cutouts or embossing.

Use metal clasps, string ties, or metal folding bars.

Have an interlocking design.

Have postage stamps attached.

Have any exposed adhesive when the flap is in the sealed or closed position.

Have nicked edges or bent corners.

Have rough, cockle, or laid finishes.

Use envelopes that can withstand temperatures of 230°C (446°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.

Load only one size of envelope at a time in the envelope feeder.

A combination of high humidity (over 60%) and the high printing temperatures may seal the envelopes.