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Temperature of the slurry further hidden lithography is applied to the thermochromic printing, also known as printed temperature change, the early thermochromic printing has passed processed into microcapsules, thermochromic print fabric dye, it is reversibleand irreversible category. Irreversible thermochromic dyes generally used as temperature detection indication.

For general reversible textiles. According to this structure can be divided into two types of inorganic and organic, organic thermochromic dyes are widely used in textiles, which is provided leuco dye, color developing agent and a sensitizer (sensitizer added) three compositions. Leuco dye - proton chromogenic substances, such as internal lipids, indole, pentyl amine compound gold color system as part of some combination of the electron donor.

Proton acid reagent is a compound-release electron compounds such as phenols, carboxylic acids, benzotriazole, halogenated alcohols. For example, crystal violet lactone and the leuco dye color-developing agent bisphenol A photochromic system, the target medium, down to below the target temperature, the bisphenol-A to release protons, the electronic crystal violet lactone ring-opening the molecular rearrangement of the double-stranded by ionic binding conjugate, bisphenol A, so that the color.

When up to a certain temperature, the color of bisphenol A binding agent protons, leuco crystal violet lactone dye decolorization. Leuco dye and a solvent in a special change of the color reagent system in order to achieve color effects, such as solvent dyes and color-developing agent of the melt has a good dissolving capacity, and to enhance the heat sensitivity of the system, it is is a known sensitizer (desensitization agent). Sensitizer is generally a melt higher fatty alcohols, fatty acids and their esters, aromatic hydrocarbons and their ethers and esters, directly determines the color temperature changes.