WRITING COLORING MATERIAL SOLID, WRITING ERASING METHOD AND WRITING ERASING DEVICE

PROBLEM TO BE SOLVED: To provide a writing coloring material solid, which can be used for writing on the sheet surface layer with projecting and recessed parts of a non-fixing type image receiving sheet and has favorable writability and erasability kept for allowing to re-use the sheet, and an erasing method and device of a writing with the writing coloring material solid on the sheet. SOLUTION: This writing coloring material solid 1 includes fine pigmented colored resin particles and a bonding resin for agglomerating the fine colored resin particles and consequently can write on the sheet surface layer 22 having projecting parts s1 and recessed parts s2 of the non-fixing type image receiving sheet 2. The erasing method and device of the writing with the coloring material solid 1 on the sheet surface layer 22 having the projecting and recessed parts of the sheet 2 are disclosed. COPYRIGHT: (C)2005,JPO&NCIPI