We currently do not test any of the ink cartridges we sell. The validity of an ink cartridge can vary greatly from printer to printer, so even if we did test ink cartridges before we supplied them, there’s a good chance they would still work differently with your printer. It is almost never the fault of the ink cartridge in these situations, but usually the printer itself.
If you have an ink cartridge that doesn’t work with your printer, or a faulty printer, feel free to contact us. We can take a look at your printer and cartridges for you, and will happily reissue an ink cartridge if we supplied you with one that did not work with your printer.