| 摘要 |
PURPOSE:To make it possible to easily control ink properties, by controlling the concn. of inorg. salts contained in ink while detecting and displaying the same. CONSTITUTION:In a dye purifying apparatus 2, an aqueous dye solution consisting of a powdery dye and pure water is controlled by a salt reducing filter so as to bring the concn. of inorg. salts therein to a predetermined value and the dye concn. thereof is also controlled while the treated dye solution is mixed with a water soluble org. solvent, an additive and pure water through valves 6-8 in a predetermined ratio under stirring in a preparation tank 1 to prepare desired ink. In this case, the liquid amount, the dye concn. and the concn. of inorg. salts according to an ion chromatography method of the ink are detected by detection parts 10-12 and the detected values are displayed. Therefore, the property control of the ink can be performed by this display and the ink for ink jet recording having stable quality can be obtained. |
