Although currentlydigital Printingproduct has not yet issued a corresponding quality standard, but its quality requirements can basically follow the requirements of traditional printed products. Due to the particularity of the printed matter itself, it is both a commodity and an artwork, which is decided. Print quality. It involves subjective and objective psychological factors and physical factors of replication engineering. From the perspective of replication technology, the printing quality should be based on. The faithful reproduction of the manuscript' is the standard. Specifically, the content of printing quality evaluation mainly includes:
(1)Mechanical and specification factors: including the position of the image size, and the accuracy of cutting, stapling, die cutting, gluing and binding.
(2)Text factors: including whether the text has physical defects, such as whether the characters are damaged, dots, edges are clear, and the text density is sufficient.
(3)Image factors: including tone reproduction, color reproduction and sharpness of the image. Tonal reproduction refers to the transferability of the light and dark tones of the image. Representing the color reproduction by the tone reproduction curve refers to the transfer characteristics of the color. The density, measured by the densitometer or the X, Y, and Z of the CIE system means that the sharpness refers to the outline of the image. Visibility of clarity and subtle levels and textures can be expressed by test methods or stars.

(4)Non-uniformity: The granularity and unevenness of the picture during the copying of the original can be measured with a micrometer or optical diffractometer.

(5)Printing repetition rate: the degree of stability of the quality in printing, the average quality can be obtained by statistical methods. At present, the country has formulated corresponding national standards for traditional printed products, such as "lithographic printing quality requirements and inspection methods", "gravure printing quality requirements and inspection methods", "relief printing quality requirements and inspection methods", etc. Although these standards It is formulated for printing products of different printing methods, and the specific data control requirements are different, but the requirements in image quality are basically the same, mainly including accurate reproduction of image gradation, rich and distinct layers; clear dots, Accurate angle; accurate overprinting; natural color reproduction, coordination, and in line with the original; stable image quality, etc.