It's not just for HP color cartridges. People have been reporting success refilling Lexmark, Compaq, Epson and Dell cartridges this way. Just about any cartridge that is sponge filled will respond well to gravity refilling.

With gravity refilling you simply remove plunger from injector and let gravity suck ink into cartridge. Granted this is time consuming but success rate is hard to ignore. Cartridges that were otherwise impossible to refill successfully responded wonderfully to gravity method. In combination with PRIMER tool and Starter Solution, refillers are now able to achieve nearly a 100% successful refill rate with HP and other black and color cartridges.

Here's how to do it.

When you overfill a cartridge there is a great risk of one color overflowing into chamber of color next to it resulting in cross chamber contamination. It can definitely cause a quick death to that cartridge if it is excessive.

The best thing you can do is try to siphon all ink out of cartridge with your injector and inject a cleaning solvent. Siphon out solvent, rinse and repeat as necessary.

This can be very time consuming so a little bit of preemptive measure may save you a lot of time and frustration. Lets examine some of things that can be done to prevent this in first place.

By inserting a toothpick into refill holes, or vent holes, you can get a better gauge of how much ink is in each chamber. Use a new toothpick in each chamber so you don't contaminate ink. Keep in mind that HP "D" cartridges only hold 19ml of ink, half that of an "A" cartridge.