In order to ensure the stability and uniformity of the ink color of the batch of products in book printing, the signing system plays a vital role in the production process. In the process of traditional printing production practice, there are many techniques for signing samples. First, if you use a machine to print the same variety of books, select a large-page signature with uniform ink color, beautiful text, and full dots as a sample after about 1,000 sheets are printed, one of which is a hanging sample, and the other is folded after being placed Look at the sample stand for comparison at any time. The main reason for this is that many printing plants currently have very different environmental conditions due to limited conditions, especially the morning and evening staff are different, and natural light (cloudy, sunny) or light can not reach As far as the standard is concerned, the distance, angle and intensity of the hanging proofs will affect the human vision, and the printed products will be different. The proofs on the sample stage can be referenced at any time, anywhere, at any time, and at any angle. This problem plays a very good role.
Secondly, if the same type of books and periodicals need different types of printing machines to print at the same time, taking J2205 (05 machine) and JS2101 (BB ​​machine) produced by Beiren as examples, the quality of the printed products varies greatly due to the different models. The products printed by the 05 machine are full of dots, thick ink color, and beautiful text. For the 05 machine, the suitable ink color needs to be chased by the BB machine, which will cause a series of quality problems such as smearing, font deformation, and a large dot expansion rate. Next, the signing of ink samples should take into account the defects of the BB machine itself. In order to prevent unnecessary quality accidents and ensure the uniformity of the ink color of the product, the high-quality products printed by the BB machine are more suitable.
Third, in the printing process of books and periodicals, the ink used by printing houses is relatively fixed, and the choice of paper has a certain influence on the sample. A part of the ink drying process is permeation drying. Use paper with relatively poor smoothness. Due to its large ink absorption, the ink color density drops greatly after drying; under normal circumstances, the ink with the appropriate density when the blot is wet is dried. Gray and false. Therefore, when signing samples, it is necessary to consider that the ink color is appropriate and larger.
In summary, for different products, different equipment and different raw materials, the sample can be flexibly mastered, and it is very important to quantify or simulate.
Secondly, if the same type of books and periodicals need different types of printing machines to print at the same time, taking J2205 (05 machine) and JS2101 (BB ​​machine) produced by Beiren as examples, the quality of the printed products varies greatly due to the different models. The products printed by the 05 machine are full of dots, thick ink color, and beautiful text. For the 05 machine, the suitable ink color needs to be chased by the BB machine, which will cause a series of quality problems such as smearing, font deformation, and a large dot expansion rate. Next, the signing of ink samples should take into account the defects of the BB machine itself. In order to prevent unnecessary quality accidents and ensure the uniformity of the ink color of the product, the high-quality products printed by the BB machine are more suitable.
Third, in the printing process of books and periodicals, the ink used by printing houses is relatively fixed, and the choice of paper has a certain influence on the sample. A part of the ink drying process is permeation drying. Use paper with relatively poor smoothness. Due to its large ink absorption, the ink color density drops greatly after drying; under normal circumstances, the ink with the appropriate density when the blot is wet is dried. Gray and false. Therefore, when signing samples, it is necessary to consider that the ink color is appropriate and larger.
In summary, for different products, different equipment and different raw materials, the sample can be flexibly mastered, and it is very important to quantify or simulate.
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