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Authenticity discrimination printed matter distinguishable in terahertz wave region and its authenticity discrimination method
Authenticity discrimination printed matter distinguishable in terahertz wave region and its authenticity discrimination method
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机译:太赫兹波区域可分辨的真伪鉴别印刷品及其真伪鉴别方法
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摘要
PROBLEM TO BE SOLVED: To provide an authenticity discrimination printed matter in which information is formed in a base material by use of pair inks comprising fullerene that cannot be discriminated by IR spectroscopy or Raman spectroscopy and thereby high concealing property of the material is achieved, in a technical field for discriminating authenticity by detecting characteristics of a terahertz spectrum by mechanical reading.SOLUTION: The authenticity discrimination printed matter of the present invention includes a printed image on at least a part of a base material, the printed image including a first print region printed with a first ink comprising fullerene (C) and a second print region printed with a second ink comprising a lithium-included fullerene salt ((Li@+C)/(PF)). When the printed image is irradiated with terahertz waves in a predetermined frequency region, absorption spectra and/or terahertz transmission images of the first print region and the second print region are different from each other near 2.5 THz frequency of the terahertz waves.SELECTED DRAWING: Figure 1
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