Methods and ink compositions for invisibly printed security images having multiple authentication features
申请人:Angstrom Technologies, Inc.
公开号:US20040233465A1
公开(公告)日:2004-11-25
An article is marked with image indicia for authentication, information, or decoration by providing a plurality of inks having a plurality of fluorescence colors when exposed to excitation energy, separating colors of the image indicia into a plurality of image levels in accordance with the fluorescence colors of the inks, and printing each image level in mutual registration on the article using the corresponding ink. The image printed with each ink may be substantially invisible under illumination within the visible spectrum. The invisibly printed images have multiple authentication features, including the use of covert UV-fluorescent materials, IR-fluorophores, microparticles, and other chemical taggants. Ink compositions, methods for making the inks, and methods and apparatus for using the inks are also disclosed.
通过以下方法在物品上标记用于认证、信息或装饰的图像指示符:提供在暴露于激发能量时具有多种荧光颜色的多种油墨,根据油墨的荧光颜色将图像指示符的颜色分成多个图像层,并使用相应的油墨在物品上以相互对准的方式打印每个图像层。用每种油墨打印的图像在可见光谱范围内的照明下基本上是不可见的。隐形印刷图像具有多种验证功能,包括使用隐蔽的紫外荧光材料、红外荧光材料、微粒子和其他化学标记物。此外,还公开了油墨组合物、油墨制造方法以及使用油墨的方法和设备。