I have a Kodak ESP5 printer & have been printing off a few pages in black but have noticed quite a bit of the colour ink has gone down but I haven't done any colour printing. I have checked the settings & can't make out why this is happening. Does anyone have any ideas please?
Another annoying thing with this printer is if say the colour ink has been used it won't allow printing to be done in black unless both cartridges have ink. Never had this bother with my old Epson & wish I'd never set eyes on this Kodak one!
It's not uncommon for printers to use coloured inks to produce 'true black'. (My Canon printer does exactly that).
I've not tried it but you might be able to switch the feature off, when printing, by clicking File > Print > Properties. It's likely that you'll find a box labelled 'grayscale printing'. (Horrid American spelling!). Click to place a tick in the box, then click 'OK'.
I have an HP printer with exactly the same problem. Even if you switch off the colour and tell it to print in grayscale, the colour still goes down. Expensive and infuriating. But you might have more luck than me with switching the colours off.