| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pencil lead a having dense handwriting and high fixing properties (when it is abraded or pressed). Ž<P>SOLUTION: A pencil lead having dense handwriting and scarcely staining (when it is abraded and pressed) can be obtained by using oil-soluble smectite, which is swelling layer silicate, at least in a part of impregnating ingredient of baked core material. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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