发明名称 |
IMPROVED INVISIBLE INK AND SCRATCH PAD |
摘要 |
An invisible ink, a method for preparing an invisible ink, and an invisible ink product are disclosed herein. An invisible ink comprising a first ink combined with a second ink is applied to a print medium. The first ink comprises a color developer activator without a color former leuco dye and the second ink comprises a color former leuco dye without a color developer activator. The first ink is prepared with a polyvinyl alcohol binder, dispersant/surfactant, and a wetting agent. The second ink is prepared with a polyvinyl alcohol binder, grind aid, dispersant/surfactant and defoamer. Heat generated by rubbing and/or scratching the invisible ink on the print medium activates the color former leuco dye and activator to change the color on the printing medium. |
申请公布号 |
CA2638581(C) |
申请公布日期 |
2015.04.28 |
申请号 |
CA20082638581 |
申请日期 |
2008.08.08 |
申请人 |
NOCOPI TECHNOLOGIES, INC. |
发明人 |
STOVOLD, TERRY W.;DOMANSKI, JOANN |
分类号 |
C09D11/50;B41M1/04;B41M1/06;B41M1/10;B41M3/14;B41M5/00;B41M5/124;B41M5/132;B41M5/155;B41M7/00;C03C17/00;C09D5/26;C09D11/00;C09K9/02 |
主分类号 |
C09D11/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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