Coating processes – Transfer or copy sheet making – Reactive components
Patent
1987-12-31
1988-11-15
Lusignan, Michael
Coating processes
Transfer or copy sheet making
Reactive components
106 21, B41M 312, B41M 500, C09D 1110
Patent
active
047848766
ABSTRACT:
A sharp imaging, non-smearing system for latent imaging and subsequent visual development of printed text or the like is provided which can be used on a variety of substrates (e.g. paper, metal, cloth, synthetic resins) and is extremely stable and easy to use. The system involves first imaging a substrate with an invisible non-blurring, non-sublimating ink containing a dissociable nickel salt such as NiSO.sub.4, with subsequent application of a liquid developer containing a dispersed color precursor such as dimethylglyoxime which reacts with nickel ion to give a sharp, long lasting red color. The developer preferably includes an accelerator such as NaOH for accelerating the above reaction so as to make it virtually instantaneous. The system of the present invention can be used in a variety of contexts, such as in self-testing materials or novelty items.
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Chemical Abstract, vol. 104, No. 16, Abstract No. 141436z, Zinchuk et al., U.S.S.R., Patent No. 1176244, Aug. 30, 1985.
"Titas Simpaticas" by P. L. DeAraujo Feio, Revista Da Sociedade Brasileira de Quimica, Boletin Cientifico, vol. XIV, Janeiro-Marco de 1945, N. 1, Rio de Janeiro, Brazil.
Dixon Marvin P.
Walker, Jr. Haywood A.
Lusignan Michael
Lynwood Graphics, Inc.
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