| 摘要 |
PROBLEM TO BE SOLVED: To provide a pigment granule by which a detergent can be prevented from being colored while being stored and coloring of foam can be quickly developed during washing, a manufacturing method of the same, the detergent including the pigment granule, and a method of coloring foam during washing.SOLUTION: [1] A pigment granule comprises a pigment, a polyvinyl pyrrolidone, and a polyvinyl alcohol. The pigment granule has a core-shell structure in which a core part thereof includes the pigment and the polyvinyl pyrrolidone, and a shell part thereof includes the polyvinyl alcohol. [2] A detergent includes the pigment granule. [3] A manufacturing method of the pigment granule comprises: a step A of adding (b) the polyvinyl pyrrolidone solution to (a) powder including a pigment to granulate; and a step B of adding (c) a polyvinyl alcohol solution to the obtained granule to granulate. [4] A method of coloring foam during washing uses the pigment granule. |
