Development of White Dye Thermal Ink

White dye-based heat-sensitive inks are unique in the way they change the color of inks, and their applications are also wide-ranging, among which are security printing, new graphic labels, product labels, special advertising and textiles. In addition, it has many other uses, such as printing on some special functions. When the syrup is heated to a certain temperature, the label of the syrup changes.

White dye-based heat-sensitive ink shows a color at normal temperature, and when it is heated, it becomes colorless. A change of color from 3 to 6°C produces a color change, so that the white dye is suitable for new items and products that do not require accurate temperature change data. It is for this reason that liquid crystal heat-sensitive inks, rather than white dye inks, are used in the production of thermometers.

Some products are printed with a white dye heat-sensitive ink that changes from one color to another, rather than from colored to colorless. This is usually achieved with an ink consisting of a white dye ink and a non-discoloring ink composition. Claim. For example, an ink manufacturer can obtain a green ink by adding a blue-white dye ink to the yellow ink. Under normal conditions, the surface of the printing ink is green, and when heated, it turns yellow, and the white dye component becomes colorless. White dye inks can change color in different temperature ranges, from -25 to 66 °C, and it presents a wide range of colors.

Source: China Washing & Dyeing Industry Information Center