I feel you on what you said about you only print in BLACK PRINT but you have to buy the Color Cartages or you will not be able to print anything on your HP Printer, I am faced with that same problem, The solution is to junk your HP Printer and when you purchase your next Printer make sure that you do not have to purchase Color Ink as well as the Black Ink in order to print in black only.
If you find on please post it here so I may find it as well, HP Color Ink is way to expensive to print thing in black print.