| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for stably producing a crayon having a desired hardness without causing insufficient gelation of a stock solution in the case of producing a crayon by using a benzylidene sorbitol gelling agent and carbon black as a coloring agent. SOLUTION: A crayon is produced by dissolving or dispersing a resin component and carbon black having a pH of≥5.0 in an organic solvent, dissolving at least one kind of gelling agent selected from dibenzylidene sorbitol, tribenzylidene sorbitol and their derivatives under heating to obtain a stock solution, pouring the solution in a forming vessel and cooling and gelling the solution. COPYRIGHT: (C)2008,JPO&INPIT
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