| Summary: | 碩士 === 嶺東科技大學 === 視覺傳達設計研究所 === 100 === Thermochromic materials reference to intelligent materials that change from colored to transparent when the temperature reaches a specific range during the course of heating or cooling; when the temperature is restored to the initial temperature, the original color will be restored. Following several decades of research and development work in the wake of the discovery of this type of compound in 1952, researchers have developed organic, inorganic, liquid crystal, polymer, bio-macromolecular, and microencapsulated powder thermochromic materials. In addition the application range of these materials has been extended from the initial room temperature materials to materials that can be used in every aspect of everyday life. Design applications include counterfeit prevention, guessing game functions like on lottery tickets, color changes, shape changes, and texture changes. As a result, thermochromic materials are considered by designers to be an option very worthy of development.
However, with regard to the use of ordinary thermochromic materials, since most of these materials are black or brown color, how can overprinting effects be achieved? Unfortunately, these effects are difficult to achieve and use in designs.
This study used experimental methods to apply an OPP mist finish via lithographic printing to thermochromic materials in 15 colors after color selection using CMYK standard colors. The thermochromic materials in 15 colors were then overprinted employing screen printing, yielding 225 double printing effects. The experimental samples consisted of (1) non-overprinted lithographic printed thermochromic material samples, (2) overprinted thermochromic material samples that had not changed color at temperatures under 31°C, and (3) overprinted thermochromic material samples that changed color at temperatures over 31°C. The effects achieved by the thermochromic material samples were compared using a color chart.
The samples provide examples of applied designs: 1. overprinted coverable effects in the same color system. 2. Color variations produced by overprinted in different color systems. 3. Use of two complementary colors to produce black hidden in a black background. This paper seeks to investigate experimental overprinted effects involving thermochromic materials, and can provide designers with ideas concerning the use of innovative designs.
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