11Selecting/Using Paper (continued)SpecificationsCaution!The ink on pre-printed letterhead stationery must be able to withstand 446°F(230°C) for 0.2 second, including mechanical pressures to 25 psi (1.8 kg/cm2).Note: If you experience curling when printing a file in duplex mode, switch to28-lb. US Bond paper.Sizes Feed Tray ExitTrayMediaTypeSettingMediaWeightSettingRecommendedPapers• Letter• Executive• Legal-14,-13.5, -13• A4, A5, A6• B5• Custom(MP TrayOnly)aa. Min. = 3.9" x 3.9"; max. = 8.5" x 14". Custom sizes must first be defined inthe printer driver: see your on-line User’s Guide for more information.Tray 1 TopRear• Plain(default)• LetterheadAuto • OKI 52206101Bright WhiteProofing Paper,32-lb. US Bond• Hammermill LaserPrinter RadiantWhite, 24 lb., USBond• Xerox 4024,20 lb.For best results:temperature =65 to 77°F ;humidity =40 to 65%RHMP Tray RearOnly• Plain(default)• LetterheadAuto• Letter• Executive• Legal-14,-13.5, -13• A4, A5, B5OptionalTrays 2, 3TopRear• Plain(default)• LetterheadAuto