A compound security feature is formed by printing latent images together with visually integrated settings using an invisible ink. Even if illuminated by a wavelength capable of rendering the inks visible, the latent images remain visually indistinguishable from their visually integrated settings. However, the latent images and visually integrated settings differ in one or more less obvious ways so that the latent images can be distinguished by using a visual aid.
申请公布号
WO2007127944(A2)
申请公布日期
2007.11.08
申请号
WO2007US67680
申请日期
2007.04.27
申请人
DOCUMENT SECURITY SYSTEMS, INC.;WICKER, THOMAS M.;WICKER, DAVID MICHAEL;CATON, MICHAEL SCOTT
发明人
WICKER, THOMAS M.;WICKER, DAVID MICHAEL;CATON, MICHAEL SCOTT