INFORMATION RECORDING MEDIUM

摘要

PURPOSE:To provide a new recording medium of high security in which an information to distinguish false from truth which can not be discriminated visually, can be read only by using a proper means and to prevent forgery for every individual information recording medium is retained. CONSTITUTION:An information recording medium is provided with a composite heat sensitive layer composed of a heat degradation printing layer 2, an electron accepting compound and a heat sensitive color developing layer 3 containing an electron donative compound developing color by the reaction with the electron accepting compound laminated successively on a substrate 1.