Ink jet printing process

Details Ink jet printing process Ink jet printing process

B - Operations, Transporting

41

J

B41J 2/21 (2006.01) B41J 2/04 (2006.01) C09D 11/02 (2006.01)

Patent

CA 2472726

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, said portions forming a printed image, wherein at time T1, the color forming composition has formed an image on the substrate, at time T2, the reacting composition is deposited onto a first portion P1 of the image, and at time T3, the reacting composition is deposited onto a second portion P2 of the image, wherein time period T1 to T2 is less than time period T1 to T3, thereby resulting in second portion P2 having a different color intensity from first portion P1.

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