| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a high grade fine organic pigment, which has conventionally been manufactured by the kneading over a long time by the solvent salt milling method, in a short time, at a low cost and with low energy. SOLUTION: In the method for manufacturing the fine organic pigment by the solvent salt milling method in which a mixture of a crude organic pigment, a grinding auxiliary agent and a water-soluble organic solvent is kneaded, as the grinding auxiliary agent, sodium chloride is used whose median particle diameter (D50) by volume base is 1-50μm, whose 95% particle diameter (D95) is≤80μm, and whose Mg content is 0.002-0.08 wt%. COPYRIGHT: (C)2007,JPO&INPIT
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