FORGERY PREVENTING MEDIUM
To provide a forgery preventing medium having high security making forgery/duplication difficult by lowering a visibility under ordinary environmental light of a latent image ink printing part while enhancing a light emission intensity in visualizing a latent image to a specific wavelength and keepi...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a forgery preventing medium having high security making forgery/duplication difficult by lowering a visibility under ordinary environmental light of a latent image ink printing part while enhancing a light emission intensity in visualizing a latent image to a specific wavelength and keeping a state of permitting secure authenticity discrimination by constituting the latent image part by aggregates of thin lines.SOLUTION: A forgery preventing medium includes a printed layer comprising a background part and a latent image part formed on a base material. In the forgery preventing medium, the latent image part is formed of a fluorescent ink having at least one kind of fluorescence, comprises aggregates of thin lines arranged at a fixed line breadth, and expresses patterns of solid lines or all-over painting.SELECTED DRAWING: Figure 1
【課題】潜像部を細線の集合で構成することによって、特定波長に対する潜像の顕像化における発光強度を高めて真贋判定が確実に行える状態に保ちながらも、潜像インキ印刷部の通常環境光下での視認性を低下させて、偽造・複製することを困難にしたセキュリティ性の高い偽造防止媒体を提供する。【解決手段】基材上に、背景部と潜像部を形成してなる印刷層を備えた偽造防止媒体であって、該潜像部が、少なくとも1種類の蛍光性を有する蛍光インキで形成され、かつ一定の線幅で配置した細線の集合からなり、実線もしくはベタ塗りのパターンを表現することを特徴とする偽造防止媒体である。【選択図】図1 |
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