A.7SPECIFICATIONSEnvelope construction is critical. Envelope fold lines can varyconsiderably, not only between manufacturers, but also withina box from the same manufacturer. Successful printing onenvelopes depends upon the quality of the envelopes. Whenselecting envelopes, consider the following components:• Weight: The weight of the envelope paper should not exceed90 g/m2 (24 lb) or jamming may occur.• Construction: Prior to printing, envelopes should lie flat withless than 6 mm (0.25 in.) curl, and should not contain air.• Condition: Envelopes should not be wrinkled, nicked, orotherwise damaged.• Temperature: You should use envelopes that are compatiblewith the heat and pressure of the printer.• Size: You should only use envelopes within the following sizeranges.MinimumMulti-PurposeTrayMaximum216 X 356 mm(8.5 X 14 in.)90 X 148 mm(3.5 X 5.83 in.)Optional Tray 2 216 X 356 mm(8.5 X 14 in.)148 X 210 mm(5.83 X 8.3 in.)Notes:• Use only the Multi-Purpose Tray to print envelopes.• You may experience some paper jams when using any mediawith a length less than 148 mm (5.83 in.). This may be causedby paper that has been affected by environmental conditions.For optimum performance, make sure you are storing andhandling the paper correctly. Please refer to “Printer and PaperStorage Environment” on page A.6.Paper SpecificationsEnvelopes