发明授权
- 专利标题： Method for revealing hidden watermarks
- 专利标题（中）： 揭示隐藏水印的方法
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申请号： US143285申请日： 1998-08-28
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公开(公告)号： US6060108A公开(公告)日： 2000-05-09
- 发明人: James E. Burd , Lee H. Leiner , Robert M. Gaydos
- 申请人： James E. Burd , Lee H. Leiner , Robert M. Gaydos
- 申请人地址： PA Cranberry Township
- 专利权人： Preservation Technologies, L.P.
- 当前专利权人： Preservation Technologies, L.P.
- 当前专利权人地址： PA Cranberry Township
- 主分类号： B41M3/10
- IPC分类号： B41M3/10 ; B41M3/14 ; B05D5/00
摘要：
A method for temporarily revealing the presence of a watermark on cellulose-based materials. The method comprises applying one of a perfluorocarbon ard hydrofluorocarbon to at least a portion of the cellulose-based material. The method also provides applying a solution containing both perfluorocarbon and hydrofluorocarbon to the cellulose-based material to vary the rate of evaporation of the solution.
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