Ink jet printing process

Details Ink jet printing process Ink jet printing process

B - Operations, Transporting

41

J

B41J 2/21 (2006.01) B41J 2/01 (2006.01)

Patent

CA 2439739

A process which comprises: a) incorporating into an ink jet printing apparatus: a color forming composition comprising a liquid vehicle and at least one color forming agent; and a reacting composition comprising a liquid vehicle and at least one material capable of reacting with the color forming agent to cause a desired color to form; b) causing droplets of the color forming composition to be ejected in an imagewise pattern onto the substrate; and c) causing droplets of the reacting composition to be ejected in an imagewise pattern onto the substrate; wherein the process results in at least some portions of the substrate bearing images comprising both the color forming composition and the reacting composition, the portions forming a printed image, wherein droplets of the color forming composition and droplets of the reacting composition are applied to the substrate in an imagewise pattern so that droplets of color forming composition and reacting composition overlap in a controlled pattern, thereby forming spots of varying sizes on the substrate, the spots being formed in areas where droplets of the color forming composition and reacting composition overlap.

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