HP has some of the lowest prices going for HP 305 black ink and tri-colour (cyan, magenta, yellow) cartridges. These cost £13.09 per cartridge and come with enough ink for roughly 120 and 100 ...

This detects non-HP ink or toner cartridges, even those that are fully functional and previously worked, blocking any that aren't using HP's security chip or circuitry. HP claims Dynamic Security ...