Is there a simple way to keep count of the number of copies I print? (Apart from sticking a bit of paper on top of the printer and writing numbers on it). I ask because I bought a new black cartridge in January, and have today had to buy a new one, and I'm pretty damn sure the old one has not, as the suppliers claim it will, printed 600 A4 pages. Canon MG 3250, Mac Pro, Mountain Lion.
I think manufacturers work to an estimated coverage of 5%. There's no way of working out how much of your page you cover with ink - unless you wanted to draw a filled black rectangle to be 5% of an A4 sheet and see how many copies you can print. But you wouldn't - would you? ;-)
Eric Jervis 