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Chapter – General Information 33
Environmental considerations
HP LaserJet printers are designed to operate in a wide range of
environmental conditions. For best performance, store and use media
at 20° to 24° C (68° to 75° F), with a relative humidity of 45 to 55
percent. Follow these guidelines when media is used in an
environment outside those temperature and humidity ranges:
l DO NOT expose the media to extremes in humidity or
temperature. If media is left unwrapped or in the printer input tray,
extreme changes in the environment will cause the media
assume unwanted characteristics.
l In the case of extreme humidity, keep paper and envelopes
tightly wrapped in plastic.
If a significant temperature difference occurs between the media
storage area and the printer’s operating environment, allow the media
time to adjust to the temperature in the printer’s operating
environment before unwrapping it. The greater the temperature
difference and the greater the amount of media to acclimate, the
longer this time period should be. Allow one day for every 10° C
(20° F) difference in temperature between storage environment and
printing environment.