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Keep toner cartridges:
#In their packaging until you’re ready to install them.
#In a cool, dry location away from sunlight (due to heat).
The maximum storage temperature is 35° C (95° F) and the maximum storage humidity is 85% (noncondensing). If the toner cartridge is moved from a cold place to a warm, humid place, condensation may occur, degrading print quality. Allow the toner to adapt to the environment for about one hour before use.
#Level during handling and storage.
Do not hold, stand or store cartridges on their ends or turn them upside down; the toner inside the cartridges may become caked or unequally distributed.
#Away from salty air and corrosive gases such as aerosols.
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