Stock material or miscellaneous articles – Article having latent image or transformation
Patent
1980-10-24
1982-11-23
Morgenstern, Norman
Stock material or miscellaneous articles
Article having latent image or transformation
283 8B, 283 9R, 427 7, 427145, 427150, 427151, 4283208, 4283215, 434328, B44F 110
Patent
active
043605486
ABSTRACT:
A hidden image, which can be made detectable by rubbing, is produced by applying to a substrate surface a first ink-like material in image configuration, then applying a second ink-like material to cover the image and an area surrounding the image. Each of the first and second ink-like materials contain one of a color-forming pair of reactants which are colorless or light colored in their unreacted states, but which together produce a colored product when brought into reactive contact. Separation of the two reactants is assured by encapsulating at least one of the reactant pair. Reactive contact is caused by rubbing the printed area or otherwise applying sufficient pressure to rupture the capsules, releasing one of the reactants into intimate contact with the other reactant.
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Parenti Frank V.
Skees Hugh B.
Bell Janyce A.
Morgenstern Norman
The Standard Register Company
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