I have an HP 8020 printer and use it to refill cartridges. The ink quality is amazing. I haven't bought new cartridges in almost a year and not anytime soon! My printer found out after a few months that I used counterfeit ink, but I'm still printing with no problems. I personally use a small drill for this. Use gloves. The ink can mess up your hands for days and your nails for weeks. - Inject the ink through the hole with a syringe. - Watch the YouTube video. Here's a great guide: Let your freshly filled ink cartridges sit for a few hours before inserting them into the printer.
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