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Print resolution is an important indicator to measure the print quality of a printer. It determines the fineness of the printer when printing images. Its level has an important impact on the output quality. Therefore, to a certain extent, the print resolution also determines the output quality of the printer. The higher the resolution, the more pixels can be displayed, which can present more information and better and clearer images. However, due to the technical characteristics of the thermal sublimation printer, although the resolution is lower than that of the ink-jet printer when printing pictures of the same size, the printing effect of the continuous color scale formed by the thermal sublimation printer can be comparable to that of the high-end ink-jet photo printer. The smooth color transition of the pictures is naturally the main feature of its printing. Because of this feature, thermal sublimation printer is not suitable for printing text, tables, etc. Printing time is not a unique parameter of thermal sublimation printer. The printing speed of laser and inkjet printers usually refers to the number of pages printed by the printer per minute, expressed in ppm (pages per minute).

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The marking speed of laser or inkjet printer products provided by all printer manufacturers for users is measured by the printing speed. However, the thermal sublimation printer uses a different printing technology from the laser or inkjet printer. Generally, it prints less than one piece per minute. Therefore, the printing speed of the thermal sublimation printer is expressed in seconds. Generally, the printing speed of the thermal sublimation printer is about 90 seconds, and the first piece takes a little longer, because the heated print head needs to be preheated. During printing, the thermal sublimation printer vaporizes the red, yellow and blue color films in turn through heat treatment and then imprints them on the special photo paper. Because the heating level of the heating device can be divided into 128 or 256 levels, the color will also correspond to the continuous color levels of 128 or 256 levels due to the different concentration of vaporized pigments. Each ternary color has 128 or 256 levels, and can generate a total of 2.097 million colors or 16.77 million colors. 16.77 million colors is almost the limit of color depth that human eyes can distinguish. Thermal sublimation printers mostly use 256 color levels.

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