I love your site. It's great. But your ink "test" didn't test what
you think it did. All you did was print a few images multiple
times. Not surprisingly, you ran out of some ink before others. So
in essence you tested the white balance of the images, not the
relative cost effectiveness of the individual tanks.
I run out of four individual tanks on the same print. I haven't had
a six color printer with individual tanks until now. But I can now
tell you I ran out of all six tanks on the same print. Moreover,
today several people posted saying the same thing.
This is important in that if you run out of all colors at the same
time, the all in one is cheaper. That is very clear.
In order to know what is more cost effective, you'd have to know
the white balance characteristics of what a person printed -- if
everything sums to grey, as in my case, the all-in-one is better.
Your experience may vary, but the methodology of your test
virtually insured a very uneven ink use. And not surprisingly
that's what you found. And I could get similar results if I printed
all images from the Arizona Red Rock country -- I'd run out of
magenta first. No question. But that's not how I'd print normally
-- I'd have the Red Rock and then the Seattle Grey/Blue/Greens and
so forth. At the end of the day I'm printing grey.
I guess I just don't understand why you think your test is valid,
and I'd be interested in why you think it is. Just curioius.
DSC
The Canon single ink tanks individually last at arouind twice as
long (number of prints) as a whole Epson 870 5-colour tank and some
quite a bit longer.
The only inconvenience would be if all 6 or several of the tanks
needed replacing around the same time.