I have the Lexmark Prospect Pro205 which uses the 100XLA cartriges and the black is running out. I contacted Lexmark 3 times, the first told me to use a dye based ink, the second told me use a pigment ink, and the third told me to use a pigment ink for the black and dye based for the colors. Now I am really confused. Which one do I do, because I dont want to mess up the cartrige and have to buy another one. I suspect the third person I talked to was correct but I want to be sure before I go and buy any ink. And any help on which brand (ink) I could use would be helpful also. Thank you.