Question:
Will the magic printing knowledge.

Answer:
according to your description, the so-called magic color printing should be printed. online information can be found broadly similar, hope to inspire you.
http://www.cpp114.com / html/200612/news_200612091165643642695.shtml

color printing is a typical representative of flowers hidden copy is printed on a textile pattern with changes in external conditions change color printing, so that the fabric color patterns from the conventional “static” into novelty of the “dynamic” and its color changes are generally reversible change.

photosensitive color printing. Also known as photosensitive photosensitive color printing color printing, color printing is the early run out of change photosensitive dye, the dye under UV irradiation changes in the structure, presenting a different color. For example, A is a colorless dyes by ultraviolet radiation, the molecular structure of the open-loop into a cyanine dye B, blue, when the dye and then exposed to visible light in the B will re-transformed into colorless dye A. Now micro-capsule technology to light changes in the dye-coated capsules, the general size of 1 to 10 microns, coated with the microcapsules after the light changed dye, its light fastness greatly increased. Optically Variable dye has been developed now that there are four basic colors: purple, blue, yellow, red, these four kinds of dye its initial structure light changes are the closed-loop type, which is not printed on the fabric color, but in the UV line irradiation can be turned into purple, blue, yellow, red. The so-called photosensitive color from one color into another color, is in the printing paste in the light changes color dyes and paint blending in general, after - from printing. For example, changing light dye blending red and blue paint, after printing, the fabric surface showed blue under UV irradiation was turned into blue-purple.

thermal color printing. Also known as temperature thermal color printing color printing, the early thermal color printing using a thermal color dye had been processed into micro-capsules, the printing of the fabric up, it has two types of reversible and irreversible. Irreversible thermal dye color temperature detection in general, as the instructions. Are generally used in textiles as reversible. According to their structure can be divided into two types of inorganic and organic, organic heat-sensitive color dyes are widely used in textiles, it is a leuco dye, color agents and sensitizing agents (desensitization agent) composed of the three.

Leuco dyes are some combination of the proton can color the material, such as within the lipids, indoles, amines and other compounds E Kim, in the color system, as for electronic parts. Chromogenic agent is a kind of interpretation can release a proton acid compounds, such as phenols, carboxylic acid, benzo-triazole, halogenated alcohol, that is, electron withdrawing compounds. For example, leuco dyes as crystal violet lactone and the reagent for bisphenol A, Qian Zhang fall color system, in a certain medium, when reduced to a certain temperature, the bisphenol A release protons, which are electronic, crystal violet lactone-opened Ring, molecular rearrangement, conjugated double-stranded linking and bisphenol A ions, thereby rendering the color. When risen to a certain temperature, the reagent Bisphenol A combination of protons, then the leuco dye crystal violet lactone closed-loop achromatic. Leuco chromogenic dyes and color system of agents in a special color effect can be achieved within a solvent, such solvent melt pairs of dyes and color agents have good solubility and can enhance the system’s sensitivity to heat, it is known as the sensitizing agent (desensitization agents). Sensitizer is generally melt high alcohol, fatty acids and their esters, aromatic hydrocarbons and their ethers and esters, and directly determine the color temperature.

At present, the thermal dye color has grown to 15 kinds of basic color, and colors can be mixed with each other to fight, chromatography and complete, but also paint with the colors blending with each other, so not only by the thermal color changing dyes into colorless and colored can also be changed from one color to another color, color temperature residence time more and more sensitive, the temperature is greater than from the original color to stay 10 ℃, the development of color now stay the temperature is less than 5 ℃.

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