| 摘要 |
PROBLEM TO BE SOLVED: To provide a pigment for a coloring mixture solution for a wet tensile strength test having solubility to all the coloring mixture solutions for the wet tensile strength test specified in revised JIS K 6768:1999, and having no surface active action in itself, and provide the coloring mixture solution for the wet tensile strength test containing the pigment. SOLUTION: The pigment for the coloring mixture solution for the wet tensile strength test comprises the pigment soluble in water, ethylene glycol monoethyl ether, formamide and methanol, having substantially no surface active action, and having stability with the lapse of time in surface tension of the mixture solution when dissolved in one kind selected from the solvents hereinbefore or in a mixed solution comprising two to four kinds selected therefrom. The coloring mixture solution for the wet tensile strength test in which the pigment is dissolved, and a kit using the mixture solution are provided also in the present invention.
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