Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...
Patent
1994-12-21
1998-05-12
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Method of use, kit, or combined with marking instrument or...
430 9, 430 42, 430 56, 430151, 430200, 503204, 503206, B41M 530
Patent
active
057504628
ABSTRACT:
A latent image printing method and apparatus uses a substrate with one main surface having a covering comprising only one of a first pair of a color developer and color former dye in at least one selected latent imaging area defining a background color in conjunction with the one main surface, wherein the color developer and the color former dye react when mixed to produce a first spectral response which is visible relative to the background color and a continuous coating over the covering which is non-porous with respect to the other of the pair and solvent-resistant to the other of the pair. The coating above selected portions of the covering corresponding to a desired latent image is removed.
REFERENCES:
patent: 3840385 (1974-10-01), Yoshida
patent: 4869981 (1989-09-01), Wing et al.
Hess Bruce H.
Nocopi Technologies, Inc.
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