I recently bought a Xerox Phaser 6125N for the school, as a result of good experiences with similar Xerox printers at previous schools. This one, however, had started to concern me as it seemed that the toner cartridges were reporting as empty when they still had a bit left in them. I knew this because the cartridges on these printers are very simple; they don’t incorporate the image transfer components like so many of Xerox’s competitors, and opening them is as simple as sliding a small trapdoor open by hand.
Last week, I did a little experiment. I borrowed a Petri dish from the science prep room, and used a funnel to shake out what was left in an ’empty’ cartridge into the dish.
Now clearly this isn’t a mountain of toner, but it is significant, and more than I was expecting. Next week when I have more time I intend to weigh both a full and ’empty’ cartridge to find out the weight difference between the two, then weigh this residue to see what percentage is being left over. Care to place any bets?