The color reproduction of the sublimation digital printer is the same as the tone reproduction, which is one of the important indicators for evaluating the quality of printed matter. The ideal color reproduction should be the restoration of the original color. Since the color of the original sometimes deviates, the color reproduction should meet the requirements of the customer.
Sublimation transfer printers are affected by color separation conditions, light sources, output materials, and development conditions during the color reproduction of printed images. Quantitative evaluation of color reproduction is a very complicated problem, so we generally objectively assess that the color of the print and the color of the scene are as close as possible to the physical quantity. However, there is no ideal equipment to completely replace the human eye, and people's assessment of color is often based on the memory or impression of the scene. The memory of common objects often deviates from the physical color: for example, the blue sky is not blue in many cases. The green trees are not necessarily all green, which makes it difficult for the sublimation printer to copy the color.
In the printing of large format sublimation printers, the balance reproduction of neutral gray is used as the basis for color reproduction. In the range of the tone range, the three primary colors of ink, that is, the gray of different proportions of cyan, magenta and yellow dots are formed. It is called neutral gray balance data in prepress and printing. Therefore, during the entire image reproduction process, neutral gray balance data is used as an important quality standard for monitoring the production process from before printing to printing. In the color copying process: the color should conform to the original, true, natural, and coordinated. The difference between the printed sheets of the same batch is less than 5.
Sublimation inkjet printer resolution is the ability of a printed image to reproduce the precision of the original image, or the ability of the image to resolve the original scene. The definition refers to the clarity of the details of the image, mainly the sharpness of the edge of the image and the edge of the line. The resolution of the printed image mainly depends on the influence of the number of screen lines added, but the number of screen lines is restricted by the printing material and printing method, so it is impossible to always use the highest number of screen lines, that is, it is impossible to always obtain the highest resolution rate. In addition, the accuracy of the printer's overprinting will also affect the resolution of the image. The resolution of the printer will also affect the clarity of the image to a certain extent. Of course, the definition is also affected by the printing process, materials, technology, and the like.