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Summary: When refilling the HP 26 ink cartridge, plug the bottom with a piece of tape to avoid leaking. Drill a hole in the top of an hp 26 ink cartridge to create a space for ink with help from an employee of an ink-filling station in this free video on HP printer cartridges.
"Hi this is Taylor and today we are talking about HP cartridges and how to refill them. Our subject today is the HP 26 cartridge and how to refill it. Obviously, this is not an HP 26, but a 29 is done in the same manner. The HP 26 cartridge, you will first need to plug the bottom with a piece of tape. Covering this maze hole enables you to fill the cartridge without it leaking everywhere. Once you have covered the maze hole, simply drill a hole in the top of the cartridge, creating a space so that you can enter the ink. Then, with a syringe needle, insert the cartridge with the ink, about 20 to 30 milliliters depending on the cartridge. Once you have finished drilling and filling with ink, close the top with some glue. Once you have plugged the top, now it is time to remove the tape from the bottom and you will need to suck air out through this maze hole down at the bottom. Once you have pressurized the cartridge by sucking out about two milliliters of ink, you will be able to print."
eHow Article: How to Refill the HP 26 Ink Cartridge