Lexmark X646e 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 

standard trays and optional trays, Loading the multipurpose feeder

 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 

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:

Some chemically treated papers used to make copies without carbon paper, also known as carbonless papers, 
carbonless copy paper (CCP), or no carbon required (NCR) paper (see the 

located

on 

the Lexmark Web site at 

 for supported chemically treated papers)

Preprinted papers with chemicals that may contaminate the MFP

Preprinted papers that can be affected by the temperature in the MFP fuser

Preprinted papers that require a 

 (the precise print location on the page) greater than ±0.09 in., such as 

optical character recognition (OCR) forms

In some cases, you can adjust registration with your software application to successfully print on these forms.

Coated papers (erasable bond), synthetic papers, thermal papers

Rough-edged, rough or heavily textured surface papers or curled papers

Recycled papers containing more than 25% post-consumer waste that do not meet DIN 19 309

Recycled paper having a weight less than 60 g/m

2

 (16 lb)

Multiple-part forms or documents