Specifications10.5Envelopes with Double Side SeamsDouble side-seams construction has vertical seams at bothends of the envelope rather than diagonal seams. This stylemay be more likely to wrinkle. Be sure the seam extends all theway to the corner of the envelope as illustrated below.Envelopes with Adhesive Strips or FlapsEnvelopes with a peel-off adhesive strip or with more than oneflap that folds over to seal must use adhesives compatible withthe heat and pressure in the printer. The extra flaps and stripsmight cause wrinkling, creasing, or even jams and may evendamage the fuser.Envelope MarginsThe following gives typical address margins for a commercial#10 or DL envelope.NOTES:• For best print quality, position margins no closer than 15 mm(0.6 in) from the edges of the envelope.• Avoid printing over the area where the envelope’s seamsmeet.Envelope StorageProper storage of envelopes helps contribute to print quality.Envelopes should be stored flat. If air is trapped in an envelope,creating an air bubble, then the envelope may wrinkle duringprinting. See “Printing on Envelopes” on page 4.6.Type of Address Minimum MaximumReturn address 15 mm (0.6 in.) 51 mm (2 in.)Delivery address 51 mm (2 in.) 89 mm (3.5 in.)CorrectIncorrectLabelsCAUTION:• To avoid damaging the printer, use only labels recommendedfor laser printers.• To prevent serious jams, always use the Multi-Purpose Trayto print labels and always use the rear output tray.• Never print on the same sheet of labels more than once andnever print on a partial sheet of labels.When selecting labels, consider the quality of each component:• Adhesives: The adhesive material should be stable at 195°C (383 °F), the printer’s fusing temperature.• Arrangement: Only use labels with no exposed backingbetween them. Labels can peel off sheets with spacesbetween the labels, causing serious jams.• Curl: Prior to printing, labels must lie flat with no morethan 13 mm (0.5 in) of curl in any direction.• Condition: Do not use labels with wrinkles, bubbles, orother indications of separation.See “Printing on Labels” on page 4.7.TransparenciesTransparencies used in the printer must be able to withstand140 °C (284 °F), the printer’s fusing temperature.CAUTION: To avoid damaging the printer, use onlytransparencies recommended for use in laser printers.See “Printing on Transparencies” on page 4.8.