Phototranschromic ink

Details Phototranschromic ink Phototranschromic ink

1992-07-01

1994-03-22

Hoke, Veronica P.

Stock material or miscellaneous articles

Article having latent image or transformation

2504741, 2504821, 430 18, 430332, 430336, 430338, 430340, 430346, 524260, 524354, C09D 1110, C09D 1102

Patent

active

052962750

ABSTRACT:
A phototranschromic ink suitable for use in a printing machine, including a water soluble, inert, nonionic polymeric resin carrier base having film forming properties, a photo acid or photo base progenitor which releases or takes up protons upon exposure to light, a pH sensitive dye which changes color in response to a change in proton levels, a water compatible non-ionic wetting agent, a water compatible non-ionic thickening agent, a neutral water soluble flow aid; wherein said ink changes color upon exposure to ultraviolet radiation and is of suitable consistency for use in a printing machine.

REFERENCES:
patent: 5028792 (1991-07-01), Mullis

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