I just received an email about getting more from my ink cartridges, when one of your colour or your black one is telling you it needs changing, take it out, and look at the label, at the top of the label is a tiny hole, use a paper clip opened up to depress into this hole and your cartridge is loaded again, this is because each one has a tiny chip which comes into operation and stops the ink flow before it is all used, by depressing as aforesaid it wakes the chip up and starts it off again.
While we're on the subject.
I have a HP Business Inkjet. The cartridges, which are only ink reservoirs, are too darn expensive. What's worse is the darn things seem barely used and very heavy with ink and their internal cartridge chips will stop the printer from printing.
They had this problem where I worked before retirement and decided to junk one of the HP printers that did this. It was on a network and everyone in the engineering group used it at one time or another.
Well when they junked it, the secretary was tossing new, unopened cartridges. The black ones would fit my printer so I got them out of the trash.
When my printer needed a black cartridge, I put one of them in and it said it was expired. Brand new expired! It would not print. Sure enough it was about 6 months out of date. I concluded that the freshness date didn't apply here, it applies to bread, eggs and beer.
So I turned back my date on my computer, by clicking on the time in the lower right hand corner, by a year and turned on the printer and printed a very nice document with HP's so-called stale ink. Conclusion: If your ink is expired, (out of date), and you are running a windows system, turn off the printer, roll back your date on the computer by a year or so, print the document, bring your date forward to present, (otherwise it messes with file dates and email dates), and you just cheated HP out of the cost of ink for a perfectly good cartridge!
By the way. My printer is on a home network and when the wife also prints to the HP, it apparently does not get a date in the data sent to the printer. She's running Linux Ubuntu.
Hope this helps someone!