HP Black Ink Cartridge
 C6615/51640/51645/51650 HP ink refill instructions

DeskJet 700/800/900/1000 Series, 1200C, 1600C

HP ink refill instructions

1. Turn the cartridge upside down. Take off the black plastic film (look hard, it's there) and push in the ball bearing which seals the filling hole, use the Allen wrench provided. You can also push the ball bearing in without removing the plastic film if you like.

2. Slowly inject up to 30ml. of ink into the filling hole by using the 30ml syringe and short blunt needle (Do not use the long sharp needle that comes with the color refill kit because this cartridge has a Mylar bag that you do not want to poke a hole in).  Unused ink may be returned to the bottle.HP ink refill instructions

3. Seal the filling hole by squeezing the cartridge sides HP ink refill instructions(this will create a vacuum when let go) and seal the hole using the set screw ( the set screw will self-tap and form an excellent plug which can be removed and re-installed each time you refill). Screw in the set screw until it is flush with the bottom of the cartridge. Now let go of your squeeze (if you didn't squeeze hard enough some ink will leak from the print head until a vacuum is formed). HP ink refill instructions

4. Set above a paper towel for 5 minutes as a drip precaution. Expect a few drips. Do not allow the cartridge to touch the paper towel at this point, since the towel will draw out the ink.  

5. Clean the syringe with water and dry for future use.

6. Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.
Or print the following pages:
http://www.refillinstructions.com/black.htm for Black
For best results, leave cartridge in printer for 8 hours after refilling so the ink can saturate the entire sponge. (Allows ink to flow to the print head).

If you are interested in resetting the ink level gauge back to full after refilling read this:
http://www.refillinstructions.com/HP/HP-reset.htm

Note:

  • Empty cartridges should be refilled immediately.

  • This work is done best over the sink.

A Refill Kit should include Ink plus the following:
1 Syringe w/ blunt needle
1 Allen Wrench
1 Set Screw

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