Here in Australia, I buy Calidad ink and refill my cartridges. It comes with an instruction sheet and you can refill up to three times. I've also bought reconditioned cartridges which worked fine but maybe didn't last as long but were less than half price on eBay.
PS I have a HP printer too.
Last edited by katesnanna; 02-19-2013 at 10:01 PM.
Reason: Adding PS