Color-forming recording material.

摘要

A color-forming recording material containing: (a) an aromatic diamine, (b) an oxidizing agent such as a quinoid type electron-accepting compound, and (c) an acidic substance such as an aromatic carboxylic acid. The aromatic diamine (a) has preferably the formula (1). <CHEM> wherein each of R<1> and R<4> is independently, of the other, a substituted or unsubstituted aryl group, each of R<2> and R<3> is, independently of the other, a hydrogen atom, a lower alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group, and X is a substituted or unsubstituted arylene group, or the formula (2), <IMAGE> wherein R<1>, R<2>, R<3> and X are as defined in the formula (1), and R is an alkyl group, an aryl group or an aralkyl group. The color-forming recording material is useful for use in a data reading apparatus using visible light and/or near infrared light.