INFORMATION DISPLAYING MEDIUM

摘要

PROBLEM TO BE SOLVED: To keep the warp in an information displaying card having a reversible thermosensitive recording layer due to the heating-up its temperature to a very little and the printing quality of a recorded image favorable.

SOLUTION: In the information displaying card equipped with the reversible thermosensitive recording layer, which is formed by laminatingly integrating plastic sheets under the conditions that let T1 and T2 be the thicknesses of the sheets arranged to the topmost layers on both the front and rear sides of the card and α1 and α2 be their average linear expansion coefficients, the plastic sheets are selected so as to satisfy inequality 1: 0.3COPYRIGHT: (C)2007,JPO&INPIT