PRODUCTION METHOD FOR FLUORESCENT PRINTED MATTER, FLUORESCENT PRINTED MATTER, IMAGE FORMING MATERIAL AND AUTHENTICITY DETECTING METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a production method for a fluorescent full color image printed matter by the sublimation thermo-sensitive transfer having excellent forgery preventive property and light resistance, and an image forming material (coloring ribbon), and to detect authenticity of the image by the printed matter. PSOLUTION: In the production method for a fluorescent printed matter, a full color image printed by the sublimation thermo-sensitive transfer is covered with a UV cut-off image protecting layer capable of controlling the UV fluorescence of the image by absorbing the UV of a specific wavelength, by using the coloring ribbon for fluorescent printing having on a substrate a coloring material layer of respective colors containing red, green and blue sublimation thermo-sensitive transferability fluorescent dyes and a binder component. A fluorescent printed matter is produced by the method. The coloring ribbon for the sublimation thermo-sensitive transfer printing having the coloring material layer of the respective colors and the UV cut-off image protecting layer are successively formed in a surface order on the same ribbon substrate. The authenticity detecting method comprises the steps of comparing light emitting patterns to the preset specific wavelength, and light emitting patterns generated by irradiation of the image printed matter with a specific wavelength light to judge authenticity by their conformance. PCOPYRIGHT: (C)2004,JPO