HI herodot,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
Sorry to hear that you are having issue with the printer printing pink. So I can better assist you, Please respond with which Operating System you are running and the your printer model number.
Which Windows Operating System am I running?
Mac OS X: How Do I Find Which Mac OS X Version Is on My Computer?
How Do I Find My Model Number?
I am always happy to help.
Thank you.