Homebrew PCBs

someone asked about getting the old ink out before refilling the tank.

The method i found best is called "dry sponge" at inksupply.com.
<http://www.inksupply.com/sponge.cfm>

Basically you cut the cartridge open and get the sponge out in oder to  
rinse it and the cartridge case.
This gets rid of all the old ink easily. With the black cart i had the  
sponge even went totally white again.
It says to cut a bit off the sponge in the istructions. I found this is  
not required for the black cart i had. Maybe for colored ones to prevent  
cross-contamination.

Of course spongeless carts would be preferrable, they seems so easy to  
refill that a hose feed system would not even be needed. I definitely know  
i would not want to refill sponge carts on a permanent basis, since each  
time you pull them out you introduce air into the printhead which must be  
cleaned out.
The dry sponge method seems a good way to use what you have on hand  
though, for testing and medium-term useage.

ST