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    • 10. 发明授权
    • Leach resistant ink for protecting documents from alteration and
document protected thereby
    • 防漏油墨,用于保护文件免受变更和文件保护
    • US5058925A
    • 1991-10-22
    • US450214
    • 1989-12-13
    • Mark Dotson
    • Mark Dotson
    • B41M3/14C09D7/12C09D11/00C09D11/02C09D11/10
    • C09D11/50Y10S428/916
    • An initially colorless, chemically sensitive protective ink which can be readily printed or applied onto a document substrate and which reacts upon contact with an oxidizing agent to form a noticeable color change is provided. The protective ink, when printed onto a document, resists leaching by water for an extended period of time, both before and after contact with oxidizing agents, and provides visible evidence of any attempted tampering. The leach-resistant ink includes a colorless material which becomes colored upon contact with an oxidizing agent and a complexing agent which reacts to form a complex with the colorless material. A fixing agent which promotes insolubilization and fixing of the complex to the document substrate is also provided.
    • 提供了一种初始无色,化学敏感的保护油墨,其可以容易地印刷或施加到文件基底上,并且在与氧化剂接触时反应以形成明显的颜色变化。 保护性油墨在打印到文件上时,在与氧化剂接触之前和之后,都能抵抗长时间的水浸出,并提供任何尝试篡改的明显证据。 耐浸渍油墨包括与氧化剂接触着色的无色材料和与无色材料反应形成络合物的络合剂。 还提供了促进复合物对文件基底的不溶化和固定的固定剂。