Lexmark 25C0010 - X 500n Color Laser Manual page 20

When developing a paper label for duplexing, the converter should ensure the label design protects against
contamination or buildup. Contamination adversely affects paper feeding and causes paper jams in the printer.
We recommend labels used for duplexing have a non-adhesive border around the label area. In addition, make sure
the release strength is sufficient to withstand temperatures of 225°C (437°F) and pressures to 25 psi. This is particularly
important with a duplex application since the label is subjected to these extremes twice. Use label ties whenever
possible. These small uncut areas (approximately 1.6 mm or 0.06 in.) help stabilize the label sheet and prevent tearing
at perforations and die-cuts during printing. In addition, using ties helps prevent the labels from predispensing in
the printer.
The slits and cuts in the labels expose the adhesives to the printer. For best results when duplexing labels, position
the label sheet so the slits and cuts are not aligned with the ribs in the duplex or redrive areas of the printer. This
eliminates any contact points between the label adhesive and the printer, thereby preventing any adhesive
contamination in the printer. The following graphics show the rib locations for the Optra S, Optra T, and Lexmark T,
respectively.
Optra S rib locations (rib width = 2 mm):
Optra T and Lexmark T rib locations (rib width = 2 mm):
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