Simple, if it does not have "Durabrite" logo on the unit it does not use pigment ink.
You can try MagicMix ink: http://www.personalizedsupplies.com/archivalinks.htm (check with them to see if it will work with your printer).
I would contact personalizedsupplies.com directly and ask them if their ink will work with your printer. From what I hear, the customer support there is great, so they should be able to answer your question for you.I checked out this site, would I be able to use this in on my printer?
If I inject the ink into the cartilages? Would that work?