PRINTED MATTER WHICH CAN BE READ BY MACHINE AND FRAUDULENCE JUDGING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a printed matter in which predetermined information is internalized in such a condition that the information can not be visually observed and the information content can be read by an infrared information reading device under infrared irradiation and a fraudulence judging method using the same.

SOLUTION: A printed image hard to be discriminated with visual observation and constituted of at least three kinds of black inks with different light absorbing properties in an infrared region is arranged on an infrared reflectable substrate so as to be able to be discriminated only by the infrared information reading device.

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