When shopping and comparing printer and ink value, we believe you should consider the combination of ink cartridge price and actual output page yield. In fact, for a valid comparison, you should compare the actual cost of ink per page; this is the only reliable metric to provide you with the best shopping experience.
Overall, to compare how much ink is in a cartridge is misleading because the ml (milliliter) volume is based on a combination of the cost per cartridge, output page yield, and varying printer efficiencies among the four leading printer systems today.