Not Pentax, but I thought is may be of interest.
I have tracked the ink consumption in my Canon S9000 for a bit over a year. This printer is used primarily for printing photos, but from time to time will be used to print color web pages and a bit of text.
The relative consumption of the individual cartridges was:
Black 1.75 - Photo Cyan 1.25 Photo Magenta 1.5 Cyan 1 Magenta 1.25 Yellow 1.5
Given the 3:2 ratio of Photo Magenta to Cyan, at this rate of consumption I'd be tossing out the equivalent of a full Cyan tank on every third Photo Magenta tank. That's a lot of expensive ink down the drain.
If I ever replace this Canon, separate color tanks will be a must.
See you later, gs
