| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a fired lead of a color pencil excellent in stability with the lapse of time, mechanical strength, i.e., bending strength, tensile strength, impact strength, etc., even having a sufficient color developing property and a drawn line concentration, and obtained by impregnating an ink into a fired lead body. SOLUTION: This method for producing a fired lead of a color pencil, is provided by forming a first fired lead body using a carbon of a carbonized organic vehicle as a binder obtained by mixing and kneading a blended composition containing at least a body material and an organic vehicle, extrusion- molding and firing under a non-oxidizing atmosphere, forming a second fired lead body by heating the first fired lead body under an oxidizing atmosphere to remove the carbon binder with oxidation, filling a perhydropolysilazane- containing liquid into pores of the second fired lead body, firing it under an inert atmosphere such as a nitrogen atmosphere or under an ammoniac atmosphere at >=1,000 deg.C to form silicon nitride, then firing under an oxidizing atmosphere at >=600 deg.C to obtain a third fired lead body and further filling an ink into the pore of the third fired lead body.
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