HP 2100 Service Manual - Page 143

Embossed paper Embossed paper is not recommended for use in HP LaserJet printers. Paper is embossed by stamping an image into the paper compressing the fibers together at approximately 200 degrees C (392 degrees F), sometimes applying a thin metal foil to the surface. The fusing process can loosen the foil; stray foil may then interfere with the electronics and cause problems with the printer. Embossed paper, with or without foil, may also cause multi-feed paper jams, as the sheets tend to stick together. Paper with Cutouts or Perforations Paper with cutouts or perforations should be avoided for three reasons: 1 The cut fibers absorb more moisture and can increase waviness and paper curl. This decreases the print quality near the cutout or perforated area. 2 The cutting knife leaves a sharp edge on the cutout or perforation. If this sharp edge is facing the toner cartridge drum during printing, it can scratch the drum surface if used frequently. 3 If printing occurs over a cutout hole. the transfer corona or transfer roller is contaminated with unused toner. Light streaks can develop on the paper in the direction of paper motion from the contaminated corona or roller. Adhesive Labels Labels are defined as paper with a pressure-sensitive adhesive backing. Label stock includes the top sheet, the adhesive, and the carrier sheet, also referred to as the backing. If available, the rear output tray should always be used when printing on labels. To prevent paper jams and feed problems, labels must: • be cut long grain (as opposed to short grain). See "Grain Field Test" (page 40) • totally cover the carrier sheet (no spaces between the labels) • contain no excessive glue. (Adhesive from some labels can cause jamming due to buildup anywhere throughout the printer mechanism. The adhesive should be acrylicbased emulsion and should not come into direct contact with the printer at any time.) • meet HP specifications for fusing compatibility. See "Fusing Compatibility Field Test" (page 42) • meet HP specifications for caliper. See "Caliper Field Test" (page 39) • have a carrier sheet that is not too smooth (can cause the feed rollers to slip) C4170-90959 Media Troubleshooting 133