| 摘要 |
PROBLEM TO BE SOLVED: To easily discriminate the replacement and prevent the incorrect use by alteration or forgery by forming an infrared absorption ink layer on an upper layer or a lower layer of a face photograph image layer. SOLUTION: Three layers of yellow, magenta and cyan used for a transfer ribbon for a face photograph image 4 are originated from a pigment or a dye having no absorption wavelength in an infrared area, and the absorption of infrared rays is not generated at all on a transferred and printed face photograph image section. As an infrared absorption ink, a colorless and transparent ink is used so that it is impossible to scrape off through a face photograph image layer only when the face photograph image 4 is scraped off, and as whether the infrared absorption ink layer is formed or not cannot be discriminated by naked eyes, and what kind of characters and figures are drawn as a masked image is not discriminated. The alteration or forgery, therefore, can be discriminated by forming the infrared absorption ink layer 3 on an upper layer or a lower layer of the face photograph image layer 4, emitting infrared rays and confirming whether the infrared absorption is generated thereon or not. |
