Your printer sellect the colors it uses base on the colors you're printing. If one tank of your printer is empty then just replace or refill the empty tank and keep using the rest of the tanks 'till its needed replacing or refilling. - Realy! no wasted inks.
Not if it's a single, 3 color tank. Many cheaper printers use 2 cartridges, one for black, and one for color (it has 3 colors in one assembly). To replace the color, you replace all 3, whether or not you've used all of the ink. I think that's what the OP is asking about.
------------------------------Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
Reply to cjl
You are about to answer a thread that has been inactive for more than 6 months. If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.