Very informative. So if i'm almost always simply printing PDF docs or articles from the web on standard quality or fast and at greyscale settings it would seem I would seldom be using the cli-221cartridge. If so, I wonder why I go thu them with some degree of regularity? I never print photos or...
On the Canon MX870 there is of course the smaller BK221 & the larger PGBK220 black cartridges. Two questions: first; is there any difference in these two cartridges as far as purpose, functionality or quality goes? and second; if either of these cartridges goes empty does the printer then...