Many manufacturer-branded (OEM) and third-party (aftermarket) vendor cartridges leave a startling amount of ink unused when they read empty. In fact, some inkjet printers force users to replace black ink cartridges when the cartridge is nearly half full, PC World has found.Coincidentally, this just happened to me: My Brother multifunction printer flashed countless messages about replacing the cyan cartridge, but when I pulled it out, I could see it was still about 1/4 full. (The aftermarket cartridges I use are transparent, not opaque like most.)
So, how can you work around this maddening situation? In my case I simply reinserted the cyan cartridge and the printer got back to work. Meanwhile, consider switching to a laser printer. Although the hardware and toner cartridges are pricier at the outset, the cost per page is significantly lower than with inkjets.