HP 2600n Service Manual - Page 29

Care should be taken not to purchase more paper than can be easily used in a short time (about three months). Paper stored for long periods can experience heat and moisture extremes, which can cause damage. Planning is important to prevent damage to a large supply of paper. Unopened paper in sealed reams can remain stable for several months before use. Opened packages of paper have more potential for environmental damage, especially if they are not wrapped with a moisture-proof barrier. The media-storage environment should be properly maintained to ensure optimum printer performance. The required condition is 20° to 24°C (68° to 75°F), with a relative humidity of 45% to 55%. The following guidelines should be helpful when evaluating the paper's storage environment: ■ Print media should be stored at or near room temperature. ■ The air should not be too dry or too humid (to moderate the hygroscopic properties of paper). ■ The best way to store an opened ream of paper is to rewrap it tightly in its moisture-proof wrapping. If the printer environment is subject to extremes, unwrap only the amount of paper to be used during the day's operation to prevent unwanted moisture changes. ■ Avoid storing paper and print media near heating and air conditioning vents or near windows and doors that are frequently open. Envelopes Envelopes can be printed from Tray 1 or Tray 2. Select the type of envelope that you are using from the Print dialog box or the printer driver. In your program, set the margins for the envelope. The following table gives typical address margins for a commercial #10 or DL envelope. Table 1-3 Envelope specifications Type of address Return address Delivery address Top margin 15 mm (0.6 inch) 51 mm (2 inches) Left margin 15 mm (0.6 inch) 89 mm (3.5 inches) ■ For the best print quality, position margins no closer than 15 mm (0.6 inch) from the edges of the envelope. ■ Avoid printing over the area where the envelope seams meet. Envelope storage Proper storage of envelopes helps contribute to print quality. Envelopes should be stored flat. If air is trapped in an envelope and creates an air bubble, then the envelope might wrinkle during printing. Envelope construction Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. Successful printing on envelopes ENWW Print-media specifications 15