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Using print cartridges
Everyday printing
Use the black and tri-color print cartridges for everyday print jobs.
Quality color photos
For more vibrant colors when printing color photographs or other special documents,
remove the black print cartridge and use a photo print cartridge in combination with
the tri-color print cartridge.
Replacing print cartridges
When buying print cartridges, look for the print cartridge selection number.
You can find the selection number in these places:
• Selection number label: Look at the label on the print cartridge that you are
replacing.
1. Selection number label
• Printer documentation: For a list of print cartridge selection numbers, see the
reference guide that came with the printer.
• HP Inkjet Toolbox: Open the HP Inkjet Toolbox, and then select the Supplies
panel.
If a print cartridge runs out of ink, the printer can operate in the ink-backup mode.
For information about installing a print cartridge, see the print cartridge installation
page.
HP Deskjet 3840 series printer User's Guide
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