HP LaserJet 4 Service Manual - Page 33

Adhesive Labels Note Printing labels using the Duplex Assembly , the 500-sheet Lower Cassette (Tray 3) or the PC tray (Tray 2) specifically is not supported. Always use the MP tray (Tray 1) to print labels. Label Construction When selecting labels, consider the quality of each component: • Adhesives: The adhesive material should be stable at the 392° F (200° C) temperatures encountered in the printer's fusing process. None of the adhesive should be exposed between the labels. • Label arrangement: If possible, use labels with no exposed areas between labels. If labels with exposed areas are used, they should be arranged on the carrier sheet (the backing) so that they cover the entire page with the exposed areas of the carrier sheet running lengthwise down the sheet. Using label stock with spaces between labels often results in labels peeling off during the printing cycle, causing serious jamming problems. • Label curl: Labels must lie flat with no more than 0.5in(13mm) of curl in any direction. • Poorly manufactured labels: Do not use labels with wrinkles, bubbles, or other indications of delamination. Site Planning and Requirements 2-5