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Method of producing reversible thermochromic display

  • US 4,554,565 A
  • Filed: 04/06/1984
  • Issued: 11/19/1985
  • Est. Priority Date: 04/06/1984
  • Status: Expired due to Term
First Claim
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1. In a method for forming a reversible thermochromic display, the improvement comprising:

  • forming a plurality of overlapping colored image layers on a support, at least one of said layers providing reversible thermochromic image, said layers being so arranged to provide images having different visual densities, and the image on one of said layers being visible at any particular temperature range, and upon temperature change, the image on any reversible thermochromic layer becoming paler or darker than the densities of other images to develop an image more discernible from said already visible image.

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