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Lexmark T640 - Printing Operations; Sending and Managing Print Jobs

Lexmark T640
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1-16 Service Manual
4061-xx0
Selecting print media
Selecting the appropriate print media for your printer helps you avoid printing problems. The following sections
contain guidelines for choosing the correct print media for your printer.
Paper
Transparencies
Envelopes
Labels
Card stock
Paper
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 printer before buying large quantities.
When loading paper, note the recommended print side on the paper package, and load paper accordingly.
Paper characteristics
The following paper characteristics affect print quality and reliability. We recommend that you follow these
guidelines when evaluating new paper stock.
For detailed information, refer to the Card Stock & Label Guide located on the Lexmark Web site at
www.lexmark.com.
The laser printing process heats paper to high temperatures of 225°C (437°F) for Magnetic Ink Character
Recognition (MICR) applications, and 205°C (401°F) 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.
Weight
The printer 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).
Unacceptable paper
The following papers are not recommended for use with the printer:
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
Preprinted papers with chemicals that may contaminate the printer
Preprinted papers that can be affected by the temperature in the printer fuser
Preprinted papers that require a registration (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

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