| 摘要 |
PURPOSE:To form a dye refining apparatus which can make a dye solution ideal for the preparation of an ink to be used in inkjet recording and writing tools by removing inorganic salts contained in a dye liquid by executing chromatography and membrane separation. CONSTITUTION:A producing section 1 makes a dye aqueous solution. The refining section 100 provided to remove inorganic salts in the dye aqueous solution has a first refining section 100A for executing chromatography and a second refining section 100B for executing membrane separation. The chromatography and membrane separation are executed in combination to eliminate inorganic salts contained in the dye solution. This enables the formation of a dye solution ideal for the preparation of an ink to be used in inkjet recording and writing tools. |
