GPX X642 User Manual

Selecting the appropriate print media for the MFP helps you avoid printing problems. The following 
sections contain guidelines for choosing the correct print media for the MFP.

For the best print quality, use 75 g/m

2

 (20 lb) xerographic, grain long paper. Try a sample of any 

paper you are considering using with the MFP before buying large quantities,.

When loading paper, note the recommended print side on the paper package, and load paper 
accordingly. See 

, 

or 

 for detailed tray-loading instructions.

The following paper characteristics affect print quality and reliability. We recommend that you follow 
these guidelines when evaluating new paper stock.

For detailed information, see the Card Stock & Label Guide located on the Lexmark Web site at 

.

The laser printing process heats paper to high temperatures of 230°C (446°F). For Magnetic Ink 
Character Recognition (MICR) applications and for non-MICR applications, use only paper able to 
withstand these temperatures without discoloring, bleeding, or releasing hazardous emissions. 
Check with the manufacturer or vendor to determine whether the paper you have chosen is 
acceptable for laser printers.

The MFP can automatically feed paper weights from 60 to 176 g/m

2

 (16 to 47 lb bond) grain long in 

the integrated and optional 500-sheet trays and paper weights from 60 to 135 g/m

2

 (16 to 36 lb bond) 

grain long in the multipurpose feeder and optional 250-sheet trays. Paper lighter than 60 g/m

2

 (16 lb) 

might not be stiff enough to feed properly, causing jams. For best performance, use 75 g/m

2

 (20 lb 

bond) grain long paper. When using paper narrower than 182 x 257 mm (7.2 x 10.1 in.), make sure 
the weight is greater than or equal to 90 g/m

2

 (24 lb bond).

The following papers are not recommended for use with the MFP: