Portrait orientation is recommended, especially when printing bar codes.
The labels can withstand temperatures up to 230°C (446°F) without sealing, excessive curling, wrinkling, or releasing hazardous emissions.
Label adhesives, face sheet (printable stock), and topcoats can withstand up to 25psi (172kPa) pressure without delaminating, oozing around the edges, or releasing hazardous fumes.
Do not use labels with slick backing material.
Use full label sheets. Partial sheets may cause labels to peel off during printing, resulting in a jam. Partial sheets also contaminate the printer and the cartridge with adhesive, and could void the printer and toner cartridge warranties.
Do not use labels with exposed adhesive.
Do not print within 1 mm (0.04 inches) of the edge of the label, of the perforations, or between diecuts of the label.
Make sure the adhesive backing does not reach to the edge of the sheet. Zone coating of the adhesive should be at least 1 mm (0.04 inches) away from edges. Adhesive material contaminates the printer and could void the warranty.
If zone coating of the adhesive is not possible, then remove a 2mm (0.06inches) strip on the leading and driver edge, and use a nonoozing adhesive.
Use labels designed specifically for laser printers. Check with the manufacturer or vendor to verify that:
Note: A combination of high humidity (over 60%) and the high printing temperature may wrinkle or seal envelopes.
Tips on using labels
Print samples on the labels being considered for use before buying large quantities.
Note: Use only paper label sheets. Vinyl, pharmacy, and twosided labels are not supported.
For more information on label printing, characteristics, and design, see the Card Stock & Label Guide available at http://support.lexmark.com.
When printing on labels:
Adjust the width guides to fit the width of the envelopes.

Paper and specialty media guide

75

To optimize performance and minimize jams, do not use envelopes that:

Have excessive curl or twist

Are stuck together or damaged in any way

Have windows, holes, perforations, cutouts, or embossing

Have metal clasps, string ties, or folding bars

Have an interlocking design

Have postage stamps attached

Have any exposed adhesive when the flap is in the sealed or closed position

Have bent corners

Have rough, cockle, or laid finishes

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Lexmark XM3100 manual