METHOD FOR PURIFYING PIGMENT DISPERSION, PIGMENT DISPERSION, INK SET, LIQUID DROPLET DISCHARGE APPARATUS AND INK TANK FOR INK-JET RECORDING

摘要

PROBLEM TO BE SOLVED: To provide a method for purifying a pigment dispersion, which removes impurities contained in a pigment dispersion for ink production and a pigment dispersion such as ink, etc., which are not removed by a conventional purification treatment.;SOLUTION: The method for purifying a pigment dispersion comprises a purification process with which an unpurified pigment dispersion containing impurities and pigment is brought into contact with an extraction liquid in a liquid-liquid interfacial contact in a minute space and the impurities in the unpurified pigment dispersion are extracted in the extraction liquid and removed.;COPYRIGHT: (C)2007,JPO&INPIT