Optical recording medium

摘要

An optical recording medium is in the form of a laminate of a base material, a heat-sensitive color-developing and an intermediate underlayer together with an optical transparent protective layer superposed on the heat-sensitive color-developing layer, the underlayer containing a near infrared absorbent and the heat-sensitive color-developing layer containing a basic colorless dye and an organic developer. The near infrared absorbent may be a dispersible near infrared absorbent which absorbs a wavelength of 0.7 to 2.5 mu m, and the dispersible near infrared absorbent is suitably graphite, copper sulfide, lead sulfide, black titanium or tri-iron tetroxide.