Most store receipts are printed on thermal paper, which uses heat-sensitive inks called leuco dyes. When a hot printhead passes over them, these dyes react with an acid developer embedded in the paper ...
This increases the stability and life expectancy of the product. The three most common types of thermochromic substances used in temperature indicating paints and materials are leuco dyes, ...
[Sdekon] shows us his technique of using Leuco dye to create items that change color electrically. Well, technically, the dye is heat-sensitive, but it is easy to convert electricity to heat.
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