What Exactly Is In Those Stupid Expensive Printer Ink Cartridges?

What’s inside an ink cartridge? The short answer is a lot of (expensive!) water, 95 per cent in fact. But mixed in is a fascinatingly complex soup of other chemicals that control the ink’s properties down to the micro-drop.

Of course, knowing all that doesn’t make shelling out for a new one any less painful. [Wired]