Envelopes HP recommends that you print envelopes from the priority input tray. Envelope construction Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. Successful printing on envelopes depends upon the quality of the envelopes. When selecting envelopes, consider the following components: ● Weight : The weight of the envelope paper should not exceed 90 g/m 2 (24 lb), or jamming might result. ● Construction : Before printing, envelopes should lie flat with less than 6 mm (0.25 inch) of curl, and should not contain air. Envelopes that trap air can cause problems.
Do not use envelopes that contain clasps, snaps, tie strings, transparent windows, holes, perforations, cutouts, synthetic materials, stamping, or embossing. Do not use envelopes with adhesives that require pressure to seal them. ● Condition : Make sure that the envelopes are not wrinkled, nicked, or otherwise damaged. Make sure that the envelopes do not have any exposed adhesive. Envelopes with double-side seams An envelope with double-side-seam construction has vertical seams at both ends of the envelope rather than diagonal seams. This style might be more likely to wrinkle. Make sure that the seam extends all the way to the corner of the envelope as shown in the following illustration:
1 2 10 Chapter 1 Device information ENWW 1 Acceptable envelope construction 2 Unacceptable envelope construction