Principle and application of dye sublimation printing technology(2)
June 02,2022
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Each heating head can adjust 256 different temperatures, so the degree of Color Sublimation also has 256 levels of difference, because the color pigments it uses are divided into yellow, cyan and magenta, and the colors it can combine are 256 yellow × 256 cyan × 256 magenta = 16.7 million kinds, so the performance effect can reach a continuous tone of 16.77 million colors with 256 color levels of three colors. The color is fresh and clear, and the details can be involved to show the difference of adjacent subtle colors; Its special ribbon contains a unique protective film, which can achieve the performance of continuous color scale. Compared with the ink-jet half color scale, thermal sublimation technology is a printing technology that truly achieves the photo quality; In the aspect of photo preservation, due to the protective layer, thermal sublimation has greater advantages than other printing technologies in the performance of waterproof, anti ultraviolet and anti fingerprint.
Schematic diagram of thermal sublimation printing technology
The combination of yellow, cyan and magenta can form a continuous color scale. Although the resolution is lower than that of an inkjet printer when printing pictures of the same size, the printing effect of the continuous color scale can be comparable to that of a high-end inkjet photo printer. The main feature of its printing is the smooth transition of picture colors. In terms of printing effect, the color thermal sublimation printer can be said to be the best partner of digital cameras. Therefore, this printer is often called a color digital photo printer, which is especially suitable for the requirements of fine and delicate skin texture of portraits when printing, and also has the characteristics of long-term preservation and not easy fading.
However, in the process of thermal sublimation printing, these three colors are not printed at the same time, but one color is used each time, and the required color requirements are combined through three times of printing. For this reason, the printing medium needs to pass through the printer three times in the printing process, which also makes the printing process of the thermal sublimation printer slow, but the high photo printing quality is enough to make up for this shortcoming.
Summary
The unique working principle of thermal sublimation printing technology makes its high-quality output the biggest highlight. Throughout the thermal sublimation printing technology, there are still some advantages and disadvantages, which are mainly reflected in the following aspects: in terms of technology, thermal sublimation technology refers to that the printer uses color bands to print color dyes on paper media by heating to form color images. In terms of performance, thermal sublimation is based on technology, and the resolution of 300*300dpi is comparable to that of inkjet printer 4800 × 4800dpi printing precision; In terms of photo storage, the storage life of the photos printed by the thermal printer is truly permanent; In terms of printing speed, the output is slow. In terms of consumables cost, thermal sublimation printer is higher than office printing consumables in terms of product price and use cost.
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