Our HP compatible inks are manufactured to match the inks in
the HP OEM (original)cartridges. Different cartridge inks will likely
differ in viscosity, surface tension, chemical composition, and
shade from other inks. This way we ensure that you have the best
quality inks available with performance that matches the original HP
Promoters of "One Size Fits All" inks are simply
trying to reduce the inventory they have to carry -- and your print
quality will suffer because of it.