Where to buy ink cartridges?

Sometimes its not possible to refill cartridges Yes you need to buy cartridges which are compatible with your make and model of printer Seeing that I don't live in America all I can suggest is Amazon.com or maybe Bestbuy.com ( don't know if they do ink) Best thing to do is google 'Canon Pixma ip1800 printer ink ' This is the sort of ink you are looking for http://www.buy.com/prod/canon-pg-30-black-ink-cartridge-for-pixma-ip1800-printer-inkjet-black/q/loc/101/204219966.html You may find cheaper compatible ink elsewhere ( it doesn't have to be Canon original ink cartridges you buy)

many malls sell ink cartridges at about the same price look at the cartridges in your printer to see what type to buy they have some codes like Z-24

Go to staples, target to buy ink. If I were you I would buy a new one. You could also buy ink from 4inkjets.com. You could get the remanufactured inks for very low prices there.

I'd recommend the compatible cartridges that Castle Ink sells -- here is a link to them: http://www.castleink.com/_Canon.html You can look up the printer model using their drop down menu, and it will tell you which cartridges you need for your specific printer model.