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There are two ways to produce thermochromic effect. The first through the use of liquid crystals. Depending thermochromic crystals are very specific molecular structures on the temperature, and thus rearranged in various ways, such as temperature changes. Since these crystals are rearranged so no way reflect light and color. The other contains include materials that change color depending on the temperature, where the chemical breaking capsules containing micro when passing a certain temperature threshold before changing color. The mechanism is a scientific miracle, but the application of these thermochromic elements, which is both entertaining and surprising. Here are some of the best applications color-changing layer.
Thermochromic dyes are
These dyes can be applied to all kinds of materials and a low threshold color change, which is a very dynamic transformation. Color-shifting inks with low threshold can be printed on shirts that change color depending on the temperature, sunlight, etc., resulting in a tie-dye effect, which can be very visually striking, or a subtle change, depending on the contrast of thermochromically activated layer and the original color.
thermochromic Layering
Thermochromism not always have to have a change of two colors. You can also switch between color and transparency, which has been used in practical applications, such as new-to-market Print card. These cards are sold in the “personality” with hand prints may be left on the surface, revealing the colorful background with white foreground. In reality, an image is positioned above a thermochromic layer. The heat of a human hand activates the chemical, which then shifts to the transparency.
thermochromic paper
Thermochromism is not limited to the entertainment / aesthetic purposes. Color Changing paper demonstrates the utility business color-changing materials. Thermal printers are able to produce a high resolution image of chemically treated paper. Thermal barcode printers are the most common applications. The chemically treated paper fed into the printer before the thermal print head to produce an image of the paper. As micro elements heat up quickly and cool the thermal print head, the exposure is to produce black on white (sometimes red, depending on the chemical treatment). Example of ZM400-2001-0100T Zebra thermal printer capable of producing hundreds of fully Inkless label, thermochromic process. In such applications, thermochromism allows for more efficient and cleaner printing process.
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Source by David D Westgrove