Patent ID: 7943684
Filing Date: 2011-05-17
Classification: B43K,C09D

Abstract:
1. A process for producing a crayon, comprising: dissolving and dispersing carbon black and a resin component in an organic solvent, thereby obtaining a first solution, dissolving at least one gelling agent selected from the group consisting of dibenzylidene sorbitol, tribenzylidene sorbitol, a derivative of dibenzylidene sorbitol and a derivative of tribenzylidene sorbitol in the first solution under heating, thereby obtaining a second solution, pouring the second solution into a molding container while continuously heating the second solution so that the gelling agent remains dissolved in the second solution, and cooling and gelling the second solution, wherein the carbon black has an average particle diameter of primary particles of from 20 to 100 nm, and the carbon black is present in an amount of 2-50% by weight based on the total weight of the crayon.