Pressure-sensitive verification system and use thereof
作者： John C. H. Chang
DOI:
关键词: Color developer 、 Optoelectronics 、 External pressure 、 Colored 、 Coating 、 Pressure sensitive 、 Engineering drawing 、 Materials science 、 Chromogenic 、 Verification system
摘要: A pressure-sensitive, laser printer heat-resistant verification system for preventing unauthorized photoduplication of security documents comprising a support bearing an information area visible principal image, and localized, autogenous coating pressure-sensitive chromogenic composition producing colored image by external pressure. The comprises (a) pressure-rupturable microcapsules containing chromogen (b) color developer capable reacting with the to form image. are substantially coextensive on support, is spaced apart from area.
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