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    • 85. 发明公开
    • FORGERY PREVENTION SHEET
    • FÄLSCHUNGSVERHINDERUNGSBLATT
    • EP1036665A1
    • 2000-09-20
    • EP99970056.0
    • 1999-10-07
    • Dynic Corporation
    • HANEDA, Akira Dynic CorporationKURIHARA, Hideo Taihei Paper Manufact. Co., Ltd.
    • B41M3/14B32B7/02D21H21/44
    • B32B7/02B32B29/002B32B2425/00B41M3/14B41M3/144B42D25/29D21H13/26D21H21/44D21H21/48D21H27/38
    • A multi-layered sheet giving a forgery prevention effect by developing different appearances when the upper surface or lower surface is irradiated with an ultraviolet ray. In a first embodiment, fluorescence coloring layers respectively developing different hues are provided on the upper surface side and the lower surface side respectively, a fluorescence coloring layer on the upper surface side only develops a fluorescence color to permit observation from the upper surface when an ultraviolet ray is applied from the upper surface side, and at least a fluorescence coloring layer on the lower surface side develops a color to permit observation from the upper surface when an ultraviolet ray is applied from the lower surface side. In a second embodiment an opacity in an area extending from the upper surface to a fluorescence coloring layer is not lower than 97% and that in an area extending from the lower surface to a fluorescence coloring layer is not higher than 96%, and an ultraviolet radiation from the upper surface does not permit a printed pattern to be observed, whereas an ultraviolet radiation from the lower surface permits the printed pattern to be observed.
    • 通过在上表面或下表面被紫外线照射时,通过发展不同的外观而产生防伪效果的多层片材。 在第一实施例中,分别在上表面侧和下表面侧设置分别显示不同色调的荧光着色层,上表面侧的荧光着色层仅形成荧光颜色,以允许从上表面观察紫外线 从上表面侧施加射线,并且当从下表面侧施加紫外线时,至少在下表面侧的荧光着色层产生颜色以允许从上表面观察。 在第二实施方案中,从上表面延伸到荧光着色层的区域中的不透明度不低于97%,并且在从下表面延伸到荧光着色层的区域中的不透明度不高于96%,紫外线 来自上表面的辐射不允许观察印刷图案,而来自下表面的紫外线照射允许观察印刷图案。