On Sunday, April 30, 2017 at 7:36:33 PM UTC-5, Paul wrote:
Andy wrote:
Looking for ideas to speed this up.

For my Canon MG 2220 printer I accidentally...

I injected yellow into the hole that is for cyan.

And injected cyan into the hole that is for yellow.

I sucked all the ink out and am flushing it out with water.

Very tedious.

Thanks,
Andy

I'm thinking this will take forever.

The cartridge design on inkjets, uses a sponge-like material
to "take up space" inside the cartridge. On a closed system,
this is for pressure equalization, so the thermal or piezo
pumping system (per pinhole), doesn't have to work against
back-pressure. When the printer prints, it wants to make
a "vacuum" inside the cartridge reservoir. When sponge is
used, the sponge expands under the slight vacuum, taking up the
space of the displaced fluid, and this prevents too
high a vacuum from happening inside the cart. It's also
why the cart cannot be filled chock-full, as the amount
of sponge and ink is carefully chosen, to give the best
vacuum pressure characteristic from (nominally) full
to (nominally) empty.

The sponge material is so special, they have patents on it.
It's not the same sponge you clean the kitchen floor with.

The sponge material will likely increase the number of
wash cycles needed, to get the cartridge to the point that
all it shows is water.

There are inkjets with "tank systems", and the physics on
those will be slightly different. And maybe, easier to clean.

Paul

What I ended up doing was attach a tube to the plunger side of syringe and fed it water from a bucket.

It had a high enuf pressure to flush them out.

Andy