HP No: 21 Black Ink Cartridge Refilling Instructions
1. Put the cartridge on some paper towels in an area where you can tolerate a spill.
2. Peal back the top label.
3. Fill the syringe with 5 ml. of black ink.
4. Very slowly & carefully inject ink into the hole under the label.
5. When finished, replace the top label.
6. Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.

If necessary leave cartridge in printer for up to 8
hours.
The
cartridge will print just like a new one. Even though the cartridge prints good,
the ink level gauge will not read full after a refill. To reset the ink level
gauge back to full follow these instructions:
This will allow you to reset the ID system & Ink Level Indicator built into the
printer.
RESETTING
1. Remove cartridge from your printer.
2. Place a piece of tape over the top left contact as shown in red on the
picture to the right.
3. With the tape covering the contact place cartridge back into printer.
4. The printer will perform and alignment page.
5. Once an alignment page has been printed remove cartridge from printer.
6. Place a piece of tape over the second contact shown in
blue.
7. Place cartridge into printer with both pieces of tape. (One covering the
first contact and one cover the second contact.)
8. Printer will print another alignment page.
9. Once the second alignment page has been printed remove cartridge from
printer.
10. Remove tape pieces from cartridge contacts (Make
sure there is no residual adhesive on cartridge contacts.)
11. Place cartridge into printer. Cartridge should now read full.
Additional Notes:
As stated above it is very important that there is no residual adhesive on the
cartridge contact point. This will make reading the cartridge difficult.
If the reset did not work on your printer, you can
cycle cartridges through to reset the level. You will need two extra cartridges
and the one you refilled. First, put the refilled cartridge in the printer.
Allow it to recognize the cartridge and print an alignment page. Take that
cartridge out and place in the first extra cartridge. Allow it to recognize and
print an alignment page. Take the first extra cartridge out and place the
second extra cartridge in. Allow it to recognize and print an alignment page.
Take the second extra cartridge out. Place the refilled cartridge back in the
printer. It will print an alignment page and then the estimated ink level will
be reset to full.
ORDER NOW:
HP21 Ink Cartridge
Refills
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HP22 Ink Cartridge Refills
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For use with:
