HP LaserJet 4250 Service Manual - Page 51

Card stock and heavy paper Many types of card stock can be printed on from tray 1, including index cards and postcards. Some card stock performs well because its construction is better suited for feeding through a laser printer. For optimum printer performance, do not use media that is heavier than 200 g/m2 (53 lb) in tray 1 or 120 g/m2 (32 lb) in other trays. Paper that is too heavy might cause misfeeds, stacking problems, jams, poor toner fusing, poor print quality, or excessive mechanical wear. The stacker and stapler/stacker do not support card stock. CAUTION Do not use the duplexer to print on card stock or paper heavier than 120 g/ m2 (35 lb), or leave the printer default set to duplex=on. Damage to the printer might result. Do not attempt to use the stacker or stapler/stacker with card stock. NOTE Printing on heavier paper might be possible if the tray is not filled to capacity, and if short-grain paper that has a smoothness rating of 100 to 180 Sheffield is used. Card stock construction Card stock construction ■ Smoothness: Card stock should have smoothness in the range of 100 to 180 Sheffield. ■ Construction: Card stock should lie flat with less than 5 mm (0.2 inch) of curl. It should be short- grain paper to improve feeding and reduce wear on the printer. ■ Condition: Make sure that card stock is not wrinkled, nicked, or otherwise damaged. ■ Sizes: Use only card stock within the following size ranges: ■ Minimum: 76 x 127 mm (3 x 5 inches) ■ Maximum: 216 x 356 mm (8.5 x 14 inches) Before loading card stock in tray 1, make sure that it is regular in shape and not damaged. Also, make sure that the cards are not stuck together. Card stock guidelines ■ If cards curl or jam, try printing from tray 1 and opening the rear output bin. ■ Set margins at least 6 mm (0.24 inch) away from the edges of the stoc. Media specifications 37