Phototranschromic ink
AssigneeXytronyx, Inc.
InventorsPeter M. Goman, Sunil Sirdesai
Life of this patent
Estimating the term…
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.
Claims20
A phototranschromic ink suitable for use in a printing machine, comprising
- a water soluble, inert, non-ionic 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 which cooperates with said dye to allow said dye to change color in response to said change in proton levels,
- a water compatible non-ionic thickening agent which cooperates with said dye to allow said dye to change color in response to said change in proton levels,
- a neutral water soluble flow aid which cooperates with said dye to allow said dye to change color in response to said change of proton levels;
- wherein said base, progenitor, dye, wetting agent, thickening agent and flow aid all cooperate to provide an ink which changes color upon exposure to ultraviolet radiation and is of suitable consistency for use in a printing machine.
A phototranschromic ink suitable for use in a printing machine, comprising
- from about 5-10 weight percent of a water soluble, inert, non-ionic 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 which cooperates with said dye to allow said dye to change color in response to said change in proton levels,
- a neutral water soluble flow aid which cooperates with said dye to allow said dye to change color in response to said change of proton levels;
- wherein said base, progenitor, dye, wetting agent and flow aid all cooperate to provide an ink which changes color upon exposure to ultraviolet radiation and is of suitable consistency for use in a printing machine.
Dependencies are inferred from the claim text.