If the particles are too big and heavy, there will be sedimentation rather than a smooth texture all the way through. Since the nozzles on an inkjet printer are miniscule, with a diameter of only ten or so microns, the ink particles must be very tiny as well so that more than 10,000 per second can be smoothly fired though the print head.
再說，噴墨印表機的噴孔很小，直徑只有十幾微米，因此油墨的粒徑也必須非常小，才能在一秒鐘上萬滴的高速中噴得很流暢。