影响印刷质量的主要因素
1.堵版。网点堵塞会引起油墨的转移量下降，印刷品颜色将发生变化。发生堵版时，要用溶剂或专用清洗剂清洗印版，同时针对堵版产生的原因采取相应的措施。
2.印版磨损。印版磨损会使网点变小、变浅，从而影响了网点的载墨量。印版磨损的结果是颜色总体变淡。有时白版磨损使白墨上墨量不足，对基材底色的遮盖力不足，此时应停机换版生产，旧版重新退镀。若印版滚筒使用过渡网墙坍塌导致不能退镀，必须重新制版。
3.图案颜色不一致。版面横向同时排布多个图案时，可能发生印版左右两端图案颜色不一致的情况。在制版过程中，尤其是满版实地时，电雕从左到右容易产生网点大小的变化，因此，应注意检查印版滚筒左右两端的印刷效果差异。
4.印版设计的合理性。在进行印版设计时要充分考虑到印版设计对印刷过程和印后加工的影响。比如80%和5%左右的网点跳跃区的色彩极易发生层次并级，应提前采取改变措施。
5.印刷环境因素。印刷车间的室温如果发生大幅度变化，油墨的流动状态就会发生变化。一般生产车间的温、温度控制在温度（23±5）摄氏度，湿度60%±5%。另外在冬季使用油墨时，要提前预热，以增加油墨的流动性。
6.印刷条件。当版面受到无规则的风吹时，印刷速度和干燥速度发生变化，都会导致印刷品的颜色发生变化。在印刷过程中应充分考虑以上因素。
Main factors affecting printing quality
1. blocking. The blocking of dot will cause the transfer of ink to decrease, and the color of printed matter will change. In case of blocking, the printing plate shall be cleaned with solvent or special cleaning agent, and corresponding measures shall be taken for the causes of blocking.
2. the printing plate is worn. Plate wear will make the dot smaller and shallower, thus affecting the ink load of the dot. The result of plate wear is that the color is generally lighter. Sometimes the white version is worn out, resulting in insufficient ink on the white ink and insufficient hiding power for the substrate background color. At this time, the production should be stopped for version change, and the old version should be recoated. If the plate cylinder cannot be unplated due to the collapse of the transition screen wall, it must be remade.
3. the pattern color is inconsistent. When multiple patterns are arranged horizontally at the same time, the pattern colors at the left and right ends of the printing plate may be inconsistent. In the process of plate making, especially when the full plate is on the spot, the electric engraving is easy to change the dot size from left to right. Therefore, pay attention to check the printing effect difference between the left and right ends of the plate cylinder.
4. rationality of printing plate design. In the process of printing plate design, the influence of printing plate design on printing process and post press processing should be fully considered. For example, 80% and 5% of the colors in the dot jump area are prone to level merging, and change measures should be taken in advance.
5. printing environmental factors. If the room temperature of the printing workshop changes significantly, the flow state of the ink will change. Generally, the temperature and temperature of the production workshop shall be controlled at (23 ± 5) degrees Celsius and the humidity shall be 60% ± 5%. In addition, when using ink in winter, preheat it in advance to increase the fluidity of the ink.
6. printing conditions. When the layout is blown by irregular wind, the printing speed and drying speed change, which will lead to the color change of the printed matter. The above factors shall be fully considered in the printing process.
