Almost all inkjet printers use up ink from all colors when they are
turned on, as a cleaning cycle sis activated to keep the nozzles from
blocking, and to expel air that forms at the nozzle entrance. Also,
each time you replace a cartridge, many do a purging cycle on all heads
to clear the heads of the one you replaced from any air introduced
during the cartridge exchange cycle.
Some inkjet models had/have a separate purge station for black versus
the colors. This is less common these days, and instead all colors are
activated with a cleaning cycle each time any one is.
It would have cost more to make the printer have separate cleaning
systems for each head/ink color.
Instead, this way they can keep the cost of the printer lower and waste
more ink which they charge you your soul for. In general for those who
are not using color, it is more economical to buy and use a black and
white laser printer. However, be warned they do now use the cheap
printer and ridiculously priced toner cartridge. They also use starter
cartridges which have 1/2 to 1/3rd of a full toner cartridge.
Anyway, I suggest always keep printing until the printer will no longer
allow printing. The warnings are often quite early to allow you to have
enough time to sell your first born child or remortgage your home so you
can afford more ink cartridges. If you wait until the printer no longer
will print, that will likely "only" leave the cartridge with 10-20% of
the ink left in it.
Sadly, his is now the way of the printer marketplace.
Some printer brands now have 3rd party ink monitor chip resetters which
sell for between $5 and 25. They allow you to use the old cartridge
over once refilled. You can place something other than ink in them if
you are not going to print with them anyway. I suggest water, but make
sure they are filled back to near factory specification in the volume of
fluid put in them. Thermal printers like Canon can have their heads
burn out of they run on a dry cartridge at which point that head color
will not work again, even with ink in it.
Art
If you are interested in issues surrounding e-waste,
I invite you to enter the discussion at my blog:
http://e-trashtalk.spaces.live.com/
Gary wrote:
> Strange problem! I purchased a new computer a little more than a year
> ago. Along with it I got a Canon Pixma MP520 printer. As all new
> printers, it had four new ink cartridges in it. I set up the software
> so it only printed black and grey. There were no colors involved.
>
> The other day it complained (slightly over a year's use) that it was
> running out of Cyan. I replaced the Cyan cartridge and it began working
> again. Bit I noticed the cartridge I removed was 40-50% full of ink.
>
> Two things occur to me:
>
> (1) Why would it be reported as empty?
> (2) Why would it be empty after a year of non-use?
>
> Should I call the manufacturer?