Compositions: coating or plastic – Coating or plastic compositions – Marking
Patent
1996-11-06
1998-02-24
Jones, Deborah
Compositions: coating or plastic
Coating or plastic compositions
Marking
106 3114, 106 3141, 106 3143, 106 3173, 106 3175, 283 72, C09D 1100
Patent
active
057208018
ABSTRACT:
A leach resistant ink composition including a diphenyl guanidine compound, an acid, and a resin. The ink composition may further include a glycol and an alcohol and can be printed on paper, such as, for example, in the word "VOID". If bleach is used to attempt to alter the document, the initially colorless ink will form a colored image in the shapes or letters printed on the paper. The ink composition is resistant to leaching upon contact with, for example, water. The presence of the acid enables the security composition to be invisible by preventing or minimizing undesirable reactions with chemically sensitive paper.
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Kibbee John E.
Nadan Wendy
Oswald Thomas R.
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