HP Deskjet 870 HP DeskJet 870C Printer - Support Information - Page 42

Method 2 - Read the Code on the Print Cartridge

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Method 2 - Read the Code on the Print Cartridge 1. Determine the manufacturing date from the code printed on the print cartridge. 51641A (Color) 51645A (Black) 2. Replace the print cartridge if it is more than 18 months after the manufacturing date code. Note Ink can evaporate through the nozzles, reducing the print cartridge life. Therefore, keep print cartridges in their sealed container or capped by the service station at the right end of the mechanism. Use a FIFO (First In, First Out) inventory control process to avoid having print cartridges longer than the print cartridge shelf-life specification.

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Method 2 - Read the Code on the Print Cartridge
1.
Determine the manufacturing date from the code printed on the print
cartridge.
2.
Replace the print cartridge if it is more than 18 months after the
manufacturing date code.
Note
Ink can evaporate through the nozzles, reducing the print
cartridge life. Therefore, keep print cartridges in their sealed
container or capped by the service station at the right end of
the mechanism.
Use a FIFO (First In, First Out) inventory control process to
avoid having print cartridges longer than the print cartridge
shelf-life specification.
51641A (Color)
51645A (Black)