Lexmark CX310 Compatibility Manual page 21

Labels 21
When developing a paper label for duplexing, the converter should make sure that the label is designed to protect
against contamination or buildup. Contamination could result in paper feed problems and paper jams.
We recommend the use of label sheets that have a non-adhesive border around the label area. Make sure that the
release strength is enough to withstand temperatures of 225°C (437°F) and pressure up to 25 psi. The ability to withstand
these factors is important because the label sheet will be subjected to these 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. Label ties also prevent 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):