| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an OCR number printing medium for preventing the forgery even when an encrypting method for check digits is simple, for which the cost of a forgery prevention measure is low and the judgement of whether it is genuine or not can be easily done. SOLUTION: An OCR number printing medium on which OCR numbers are printed in a black ink is formed of a carbon pigment as a main component, and a part of the OCR numbers is printed in an infrared absorption ink other than the black ink. Number printing sections other than number printing sections 30 printed in the black ink are number printing sections 20a printed in the infrared absorption ink of the tone different from that of the black ink or number printing sections 20b printed in a colorless infrared absorption ink on the OCR number printing medium.</p> |
