| 摘要 |
PROBLEM TO BE SOLVED: To provide a sintered solid drawing material which is not impaired in strength and light fastness, does not cause show-through and is excellent in color phase and eraser erasability and optimal for underline applications, such as fluorescence.SOLUTION: In a sintered solid drawing material, a resin dissolved with or including a dye is packed in pores of the core body of a solid drawing material. The resin including a dye is soluble in an organic solvent and consists of a dyeing resin, and the resin dissolved with or including a dye is in the form of a coating of a thickness of 1 μm or smaller. The core body of the solid drawing material is a sintered ceramic core body formed by blending boron nitride with a ceramic binder and sintering. Available dyes include oil-soluble dyes, cations of dimethyl distearyl ammonium salts, salt-forming dyes configured as acidic dyes and fluorescent dyes, from the standpoint of erasability and water resistance. |
