Refilling HP 970, HP 971 with refill tool QU-FILL Profi

The QU-FILL Profi in solid brass quality enables you to refill the HP 970, HP 971 ink cartridges without altering the cartridge. After a few simple preparing steps you can open the ball valve of the ink outlet with the QU-FILL Profi. Thereby a vacuum is created inside the cartridge and the ink is sucked into the cartridge automatically.

Before refilling the cartridge you need to exhaust the air from the air bags inside the cartridge. For that press the QU-FILL Profi, which you have set onto an empty syringe, onto the ink outlet. Press air into the inside of the cartridge. The arising pressure squeezes the air out of the bags through the vent holes.

For the refill techique with vacuum it is necessary to seal these holes (the big one as well as the small one on the front of the cartridge). You can use normal parcel tape which compensates even slightly elevations by firmly pressing it on.

Press the QU-FILL Profi without syringe into the ink outlet to reduce the pressure that you created before. Draw the recommended amount of ink into a syringe and screw the QU-FILL Profi on. The top of the tool fits easily into the ink outlet at the front. You feel a little resistance when opening the ball valve with the top of the QU-FILL Profi. When pulling the plunger of the syringe up and holding it in the upper position for a while the vacuum evolves inside the cartridge. You can see air cells inside the ink in the syringe. When you let go of the plunger the ink runs into the cartridge to compensate the pressure and the plunger slowly slides back down. Repeat this procedure until the recommended amount of ink is filled in.