Low energy heat activated transfer printing process

  • US 5,642,141 A
  • Filed: 08/05/1996
  • Issued: 06/24/1997
  • Est. Priority Date: 03/08/1994
  • Status: Expired due to Term
First Claim
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1. A method of printing dye by means of a printer which uses liquid ink, comprising the steps of:

  • a. preparing a liquid ink formulation comprising a heat activated dye, a liquid carrier, and at least one agent which disperses and emulsifies said heat activated dye, wherein said heat activated dye activates upon the application of heat at or greater than the activation temperature for 210 seconds or less, and wherein said at least one agent does not substantially increase the activation energy required to activate said heat activated dye after said heat activated dye is printed onto a medium;

    b. supplying a printer with said liquid ink formulation;

    c. printing said liquid ink formulation by means of said printer to form an image on a medium without materially activating the heat activated dye; and

    d. transferring said image from said medium to a substrate on which the image is to appear by the application of heat and pressure at a temperature which is sufficient to activate the heat activated dye for 210 seconds or less, so as to cause the heat activated dye to transfer on to said substrate.

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