In order to ensure the stability and unity of the batch of ink products in the printing of books and periodicals, the sample-licensing system plays a crucial role in the production process. In the traditional printing production practice, there are many tips for signing. First of all, if a machine is used to print the same variety of books, a large page with ink uniform, beautiful text, and full dots will be selected as sample proofs after 1,000 printing. One of them will be used as a hanging sample, and the other will be placed in a folded form. Look at the sample stage so that it can be compared at any time. This is mainly because many printers currently have very different environmental conditions because of limited conditions. In particular, if two classes are available sooner or later, the natural light (yin and sunny days) or the light cannot reach the standard. To the standard, the distance, angle, and illumination intensity of the hanging proofs will have an impact on people's vision. The printed products will be different. Proofs on the sample stage will be referenced at any time, anywhere, at random, and at any angle. This problem plays a very good role.
Second, if the same variety of books and magazines require different types of printers to print at the same time, take J2205 (05 machines) and JS2101 (BB machines) produced by Beiren as examples. Due to the differences in models, the quality of printed products is quite different. The machine's outlets printed on the 05 machine are full, thick in ink, and beautiful in text. For the proper ink of the 05 machine to be chased by the BB machine, it will produce a series of quality problems such as pulling dirty, font variants, and large dot enlargement rates. In the future, ink signing must take into account the defects of the BB machine itself. In order to prevent unnecessary quality accidents and ensure the uniform ink color of the product, the ink color sample is suitable for the high-quality products printed by the BB machine.
Third, in the printing process of books and periodicals, the use of printing ink is relatively fixed, and the choice of paper has a certain influence on the sample. Part of the drying process of the ink is osmotic drying, the use of relatively poor smoothness of the paper, due to its large amount of ink absorption, after drying, the ink density decreased greatly; usually, when the density of the ink is dry when the density of the appropriate ink is dry Gray hair is weak. Therefore, it is necessary to consider the ink color to be larger when signing the sample.
In summary, for different products, different equipment and different raw materials, the sample can be flexibly mastered, and quantification or simulation and quantification are very important.
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