Get ready for printing

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Make good preparations before printing (Part 2)

sixth, reduce the hollowed out and dead set design as far as possible. If allowed, try to design lamination. If overprinting is necessary, it is best to make the last color a large line to make up for the printing shortage

seventh, the bar code design generally requires that the bar code be designed along the printing direction, so as to avoid the bar code deformation caused by printing ink, stretching, etc., resulting in inability to read; At the same time, the bar code is usually designed as 1:1. Eighth, a very important factor in the design of the composition is the direction of the composition, which is directly related to the cutting direction. Therefore, before the composition, we must first consider the requirements of the customer's packaging machine and the product structure, and clarify the direction of the composition, so as to ensure the accurate direction of the product after cutting.

finally, in order to ensure the qualified size of the product and avoid the size change in the process of printing, compounding, bag making, etc., the plate roller should be stretched or bled during the plate making, so as to ensure a reasonable size range

design and typesetting is a living thing, and the key to its smooth implementation. The above points must be considered when reviewing the design. Of course, there are many factors worth noting, so I won't go into detail here

the second point of prepress preparation is to make a plate roller. The quality of the plate roller directly affects the difficulty and quality of printing

the determination of the electric engraving process is the key to the quality of the plate roller. At the same time, the electric engraving equipment and techniques are important factors to determine the quality of the plate roller. The electric carving angle, carving depth, wall width, the new and old electric carving needle, and the addition number will directly affect the quality of the plate roller, and then affect the difficulty of printing. Generally, 80% and 5% points shall be avoided; Several layers of tiling shall avoid moire; The depth of the electric engraving point should not be too deep, otherwise it will cause uneven ink, ink avalanche and printing ink; Too light, it will cause the color is not full

in addition, the hardness and surface finish of chromium and copper plating have a great impact on the printing quality of the plate roller. If the chromium layer or copper layer is too soft, the service life of the plate roller will be shortened; If the surface is too rough, the abrasion of the scraper will be accelerated, and the scraper marks will easily appear. In short, the quality of the plate roller is an important condition to ensure the printing quality

the third point of prepress preparation is to accept the version roller and proofread the sample. Recently, the Fraunhofer project team began to plan to use engineering plastics to manufacture some parts of automobile engines/p>

the acceptance plate roller should pay attention to several aspects: first, the plate should be checked for dirt, scratches, burns and other defects; The second is the size of the master roll, including whether the outer diameter increases according to the regulations. At the same time, pay strict attention to the concentricity, Ovality and hardness of the master roll; Third, whether the plate sequence and the number of plate rollers are consistent with the requirements of the jigsaw design. Fourth, check whether the plate sample is consistent with the plate roller

proofreading is a very important work, which requires great patience and care. First, all words and patterns are consistent with the original design; Second, the layout position is consistent with the composition design; Thirdly, the mark line and detection line meet the design requirements; Fourth, the proofing effect is completely or basically close to the required effect, and the depth and overprint accuracy meet the design requirements

the fourth point of prepress preparation is the preparation of ink and materials. After the plate roller is in place, it is best to use a small proofing machine and use a small beaker to prepare the color required by the customer for proofing, so as to satisfy the customer as much as possible, and record the ink manufacturer, model, type and the proportion of spot color ink used one by one. As another basis for official printing. In addition, according to the needs of the customer's product structure, we will introduce how to use the concrete pressure testing machine to prepare various raw and auxiliary materials, including printing film, printing ink (ordinary gravure printing ink, polyester ink, etc.), special solvents, etc

in a word, making full preparation before printing is the premise and key to ensure the smooth printing. Only when everything is ready can we ensure good product quality and high production efficiency, and greatly reduce quality loss

it is easy to see

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