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Thermal sublimation technology uses heat energy to transfer pigments to the printing medium. The intensity of each color is controlled by the temperature change of the print head. There can be 256 levels at most. Because the pigment is applied to the paper through the sublimation process, the fusion of the three primary colors can form a continuous color scale, which is much better than the ink drop effect of inkjet printing. As far as the printing effect is concerned, the color thermal sublimation printer can be said to be the best partner of digital cameras. Therefore, this printer is often referred to as a color digital photo printer, which is particularly suitable for the delicate skin texture of human portraits when printing, and also has the characteristics of long-term preservation and not easy fading. Magenta, yellow and cyan are what we call the three primary colors. 

Any other color can be combined by the three primary colors. The thermal sublimation printer realizes a variety of colors and color depths through the combination of the three colors. However, in the process of thermal sublimation printing, the 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 relatively slow, but the high photo printing quality is enough to make up for this shortcoming. Some thermal sublimation printers have a film attaching process after three times of coloring. 

That is, the special materials on the ribbon are sublimated on the three layers of color and attached to the paper to form a protective film, which can play the role of anti oxidation discoloration, waterproof, anti fingerprint, etc. This is impossible for inkjet printers. The color band of thermal sublimation printer is disposable. The color band is generally sold together with the printing paper. Each roll of color band consists of three colors: yellow, red and blue. Each time a photo is printed, a group of color bands will be rolled. Therefore, although the thermal sublimation printer can also print with low resolution, the printing cost cannot be reduced, and the printing speed can only be slightly increased. It is recommended to always print with the highest resolution.

matters needing attention

By the way, it should be noted that after printing, the printed image and text will leave a latent image on the used ribbon. If the printed content belongs to confidential information, it is recommended to keep the ribbon and destroy it after use. Printer resolution, also known as output resolution, refers to the maximum number of points that can be printed per inch in both horizontal and vertical directions during printing and output. It is usually expressed as "point / inch", or dpi (dot per inch). The so-called maximum resolution refers to the maximum resolution that the printer can print, that is, the limit resolution of the printout. The printer resolution usually refers to the maximum resolution of the printer, and the resolution of the thermal sublimation printer is generally 300 × About 300dpi.

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