Following the manufacturer s specifications we have dye based inks for HP, Epson, Canon, Lexmark, Brother, Compaq, Xerox etc. And we have different pigment based inks for cartridges of different manufacturers, as above. In summary, quality cartridge recharging requires a flawless fit between the chemistry of the ink and the cartridge for which the ink is formulated. We give you the flawless fit. An air bubble acts like a road block preventing the ink to travel any further.
Some cartridges rely on a moderate vacuum for their operation.
All this is explained in our easy to read instructions. If what we have written so far makes sense to you, you will make sense of our instructions. But all of us think and work slightly differently and users may have questions. When they do, they should be able to reach a voice, not a voice-mail, and pose their question. We give you the voice and the answer.