Envelopes with double-side seams An envelope with double-side-seam construction (vertical seams at both ends of the envelope rather than diagonal seams) is more likely to wrinkle. Make sure the seam extends all the way to the corner of the envelope as shown in the following illustration: Acceptable Unacceptable Envelopes with adhesive strips or flaps Envelopes with a peel-off adhesive strip or with more than one flap that folds over to seal must use adhesives compatible with the heat and pressure in the printer: 200° C (392° F). The extra flaps and strips might cause wrinkling, creasing, or jams.
Card stock and heavy media For optimum performance, do not use paper heavier than 157 g/m 2 (42-pound). Paper that is too heavy might cause misfeeds, stacking problems, paper jams, poor toner fusing, poor print quality, or excessive mechanical wear. Note You might be able to print on heavier paper if you do not fill the input tray to capacity and if you use paper with a smoothness rating of 100 to 180 Sheffield. 48 Chapter 2 - Operation EN