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网印中要注意的印刷细节

来源:http://www.jindingyinshua.com   日期:2018-11-29

印刷只是对制版质量的检验,然而在印版质量稳定的前提下,由于印刷工人的掉以轻心,同样不能得到理想的印刷品,反而会造成更大的浪费,出现次品或废品。

Printing is only a test of plate-making quality. However, on the premise of stable plate quality, because the printers are not careful, they can not get the ideal printed matter, on the contrary, it will lead to greater waste and produce inferior or waste products.
在批量印刷前,应先固定好印刷网版倒入油墨试印,检查版面图文复制的层次、墨色、墨层厚薄、规格、套准精度等。若套准精度较差,可以根据框架前面的微调旋钮进行调整;若油墨的色相不对,检查是否用错油墨,并立即更换;若着墨不良,可用溶剂擦拭印版图文部分,使油墨的透过性能及对承印物的润湿性得到一定的改善;若图文的阶调和层次有较大差异,则应立即更换印刷网版。在印刷过程中必须注意如下几点。
Before batch printing, the printing screen should be fixed and put in the ink for trial printing, and the levels of layout, ink color, ink thickness, specifications, registration accuracy and so on should be checked. If the alignment accuracy is poor, adjustments can be made according to the fine-tuning knob in front of the frame; if the color of the ink is not correct, check whether the wrong ink is used and replace it immediately; if the ink is not good, the solvent can be used to wipe the printing plate and text parts, so that the ink permeability and the wettability of the substrate can be improved to a certain extent; if the ink color is not correct, check whether the wrong ink is used and replace it immediately. If there are great differences in the level of reconciliation, the printing screen should be replaced immediately. In the process of printing, the following points must be paid attention to.
(1)勤看规矩。由于版框在印刷时来回不停地运动,使印版与框架在往返运行中受到碰撞及震动,二者间发生小小的位移,就出现套印不准确的现象,影响产品的外观质量。因此要勤看规矩,及时发现,及时调整。
济南标签印刷
(1) Watch the rules diligently. Because the plate frame keeps moving back and forth during printing, the plate and the frame are collided and vibrated in the round trip operation. A small displacement occurs between the plate and the frame, which results in imprecise overprinting and affects the appearance quality of the product. Therefore, we should be diligent in observing the rules, discovering them in time and adjusting them in time.
(2)常检查样张。发现印刷品印迹缺墨,应立即用干净的棉布擦拭网版。这种情况多数是由于印版上粘有碎塑料膜或油墨结皮干燥堵塞网版所致。若发现墨色不匀或变得浅淡,可能是油墨粘度过大,应立即停机用溶剂稀释油墨的粘度,同时用汽油擦拭版面的图文部分,防止渗墨或堵网,以便于连续工作。
(2) Examine samples frequently. If ink deficiency is found in printed matter, the screen plate should be wiped with clean cotton cloth immediately. This situation is mostly due to the sticking of crushed plastic film or ink crust on the printing plate to dry and clog the screen plate. If the ink color is uneven or light, it may be that the ink viscosity is too high. Solvent should be stopped immediately to dilute the ink viscosity. At the same time, gasoline should be used to wipe the graphic and textual parts of the layout to prevent ink penetration or blocking, so as to facilitate continuous work.
(3)半成品的堆放要整齐。在半成品的堆放过程中,一定要使纸的两边下垂叠放。否则纸张由于本身的重力作用而形成上弓形,纸的两边上翘而不平坦,印刷时造成纸张传递困难,常会出现断张现象。纸垛不平时,可用硬纸板垫平,同时纸垛的高度要经常用分纸机构的调节旋钮进行调整,以便纸张传递顺畅,印刷过程顺利进行。
(3) The stockpiling of semi-finished products should be neat. In the process of stacking semi-finished products, the two sides of paper must be sagged and stacked. Otherwise, due to the gravity of the paper itself, it will form an upward bow, and the two sides of the paper will be warped and uneven, which will make the paper difficult to transfer and often lead to tension breakage. When the stack is uneven, it can be padded with cardboard. At the same time, the height of the stack should be adjusted by the adjusting knob of the paper splitting mechanism so that the paper can be transferred smoothly and the printing process can be carried out smoothly.