Latent image printing and development

Details Latent image printing and development Latent image printing and development

B - Operations, Transporting

41

M

35/57, 42/9

B41M 3/00 (2006.01) C09D 11/00 (2006.01) G09B 3/04 (2006.01)

Patent

CA 1072833

ABSTRACT This invention relates to alkali developable, paper- based systems printed with invisible phenolphthalein inks and made reusable through many development cycles by employing critical concentrations of dye reactants in conjunction with a paper having a defined water soluble acidity- alkalinity.

260705

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