Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing chemical
Patent
1991-02-08
1993-05-11
Bell, Paul A.
Printed matter
Having revealable concealed information, fraud preventer or...
Utilizing chemical
283117, 283904, 428916, B42D 1500
Patent
active
052095150
ABSTRACT:
A document is provided having a solvent sensitive and/or pressure sensitive ink printed thereon which reacts to the application of a solvent and/or pressure to form a visible stain or image. The ink includes a first composition of solvent soluble, water insoluble dye particles, a binder, and optionally, an opacifier. Alternatively, the first composition may be combined with a second composition which includes an encapsulated solvent and optionally a stilting material. The first and second compositions may be printed on the document in separate steps or printed together as a self-contained composition. The ink may be printed on the entire surface of the document or only on selected areas thereof.
REFERENCES:
patent: 2780015 (1957-02-01), Whitehead
patent: 4629630 (1986-12-01), Devrient
patent: 4662651 (1987-05-01), Mowry, Jr.
patent: 4710617 (1987-12-01), Mouchotte
patent: 4725497 (1988-02-01), Honnorat et al.
patent: 4729792 (1988-03-01), Seitz
patent: 4846502 (1989-07-01), Chang et al.
patent: 4898780 (1990-02-01), Seitz
patent: 5033773 (1991-07-01), Brunea et al.
Research Disclosure Nov. 1979 #18747. "Security Document".
Dotson Mark D.
Lakes A. Dale
Mowry, Jr. William H.
Bell Paul A.
The Standard Register Company
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