Computer printers, especially Canon branded printers, were nice to people like me who refilled the print cartridges. Their cartridges didn't have an electronic chip on the cartridge like other brands and I have been happily refilling an old Canon printer for years. It is a bit messy and I always end up with multi-colour fingers for a couple of days after refilling.
Over the last few years, all Canon print cartridges have a 'chip' which makes it a bit difficult to refill.
In my computer refurbishing project I get given lots of different printers. Epson is a brand which has a chip on each cartridge. Fortunately some boffins made a cheap chip resetter for the Epson printers I have in the shed, so I can refill them with cheap ink and reset the chip with the System Beater.
Some pics...
Epson cartridge showing the 'Chip'.
The Chip resetter...
Aligning the setter with the chip...
The red light blinks; it turns green and the cart can be inserted in the printer.
Epson.com doesn't sell this chip resetter.