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Printing process

  • US 8,764,177 B2
  • Filed: 10/27/2010
  • Issued: 07/01/2014
  • Est. Priority Date: 10/30/2009
  • Status: Expired due to Fees
First Claim
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1. A process for printing an image on a substrate comprising the steps of:

  • (a) applying an ink comprising polymer-encapsulated pigment particles and an aqueous medium to a substrate by means of an ink jet printer, wherein(i) the said particles are dispersed in the aqueous medium, and(ii) the said particles comprise a carboxy-functional dispersant crosslinked around a pigment core by a first crosslinking agent; and

    (b) crosslinking the polymer-encapsulated pigment particles with a second crosslinking agent, wherein the second crosslinking agent crosslinks the polymer-encapsulated pigment particles by the formation of permanent covalent bonds between the crosslinking agent and the polymer-encapsulated pigment particles.

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