Lexmark C748 User's Guide - Page 124
Tips on using envelopes, Card Stock & Label Guide
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Paper and specialty media guidelines 124 • Use transparencies designed specifically for laser printers. Transparencies must be able to withstand temperatures of 230°C (446°F) without melting, discoloring, offsetting, or releasing hazardous emissions. • To prevent print quality problems, avoid getting fingerprints on the transparencies. • Before loading transparencies, flex the stack to prevent sheets from sticking together. • We recommend Lexmark transparencies. For ordering information, see the Lexmark Web site at www.lexmark.com. 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 220°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 70‑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. Tips on using labels The printer supports the following types of labels designed for laser/LED printers: • One‑sided paper labels • Vinyl, pharmacy, and double‑sided labels • Vertical marketing labels For detailed information on label printing, characteristics, and design, see the Card Stock & Label Guide available on the Lexmark Web site at http://support.lexmark.com.