| 摘要 |
In the present invention, a carbon black paint which is less likely to produce a sediment is manufactured by carrying out an easy and compact dispersion treatment. A stock solution of carbon black powder in an organic solvent flows in a liquid tank where an ultrasonic wave is applied to a solution while stirring the solution by a stirrer to disperse the powder. Then, the solution is filtered through a filter located near the ultrasonic applying section. Only the dispersion-treated solution passing through the filter is fed to a product tank through a liquid discharge port.
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