Tips on using envelopes

Print samples on the envelopes being considered for use before buying large quantities.

• Use envelopes designed specifically for laser printers. Check with the manufacturer or vendor to ensure that the envelopes can withstand temperatures up to 230°C (446°F) without sealing, wrinkling, curling excessively, or releasing hazardous emissions.
• For best performance, use envelopes made from 90‑g/m² (24‑lb bond) paper or 25% cotton. All‑cotton envelopes must not exceed 75‑g/m² (20‑lb bond) weight.
• Use only new envelopes from undamaged packages.
• To optimize performance and minimize jams, do not use envelopes that:
• Have excessive curl or twist
• Are stuck together or damaged in any way
• Have windows, holes, perforations, cutouts, or embossing
• Have metal clasps, string ties, or folding bars
• Have an interlocking design
• Have postage stamps attached
• Have any exposed adhesive when the flap is in the sealed or closed position
• Have bent corners
• Have rough, cockle, or laid finishes
• Adjust the width guides to fit the width of the envelopes.

Note:  A combination of high humidity (over 60%) and high printing temperature may wrinkle or seal envelopes.