Evaluation method of modified treatment water

PROBLEM TO BE SOLVED: To solve problems for example, there is no evaluation method and evaluation index for evaluating, whether or not modified treatment water is properly treated and modified to preferable level, using a kohga stone, and when the modified treatment water is used as water soluble cut oil, quality determination cannot be performed unless the water soluble cut oil is actually prepared.SOLUTION: The evaluation method of the modified treatment water is configured to: add a grain diameter reference liquid to the produced modified treatment water; then, evaluate dispersion property of spherical polystyrene latex grains contained in the grain diameter reference liquid, thereby quality determination of the modified treatment water is performed. Therefore, the quality determination of the modified treatment water can be performed soon, after performing modification treatment, in which the quality is unknown unless the modified treatment water is used actually.SELECTED DRAWING: Figure 4