印刷过程涉及到机械、材料、电子等许多技术领域，生产中出现的印刷故障十分复杂，故障产生的原因往往与许多因素有关。下面来讲讲济南印刷时出现常见的七大质量问题。

The printing process involves many technical fields such as machinery, materials, electronics, etc. The printing failures in production are very complex, and the causes of the failures are often related to many factors. Now let's talk about seven common quality problems in Jinan printing.

1、偏色

1. Dichroism

原因可能有原稿质量较差、制版不准确、晒版条件控制不一致、墨色控制步好、看样台光源不标准等。

The reasons may include poor quality of the original, inaccurate plate making, inconsistent control of printing conditions, good ink control, non-standard light source of the sample stand, etc.

2、颜色暗淡，不鲜艳

2. The color is dim and not bright

原因可能有原稿质量较差、制版曲线设计不佳、分色片密度较低、晒版不实印迹过浅、印刷压力不足、印刷机老化、润版液过量、纸张粗糙、白度过低等。

The reasons may include poor quality of the original, poor design of the plate making curve, low density of color separators, poor printing, insufficient printing pressure, aging of the printing machine, excessive fountain solution, rough paper, low whiteness, etc.

3、文字发水

3. Writing water

原因可能有阳图密度较低、胶片灰雾度较大、晒版不实印迹过浅、印刷压力不足、印刷机老化、润版液过量、油墨量不足等。

The reasons may be low positive image density, high film haze, poor printing, insufficient printing pressure, aging of the printing machine, excessive fountain solution, insufficient ink, etc.

4、糊版

4. Paste version

由于印版图文部分溢墨，造成承印物上的印迹不清晰，属胶印印品故障。

Due to the overflow of ink on the image and text of the printing plate, the print on the substrate is not clear, which belongs to offset printing fault.

5、脏版

5. Dirty edition

因印版润湿部分不良，造成空白部分着墨。

Due to the poor wetting part of the printing plate, the blank part is inked.

6、掉版

6. Version dropping

平印版的图文细微调子变浅，网点和线条面积减小，甚至失去亲墨性。

The fine tone of the image and text of the lithographic plate becomes lighter, the area of the dot and line decreases, and even loses the ink affinity.

7、网点增大

7. Increase of outlets

承印物上网点面积比印版上相应部分的网点面积增大。

The dot area of the substrate is larger than that of the corresponding part on the printing plate.

此外要注意再好的机器如果使用的人操作不到位，相应的产品也会有瑕疵。所以印刷人员的操作规范程度也会直接影响到印品好坏。关注我们http://www.xinfengyinshua.cn了解更多相关内容！

In addition, it should be noted that if the user of the best machine does not operate it properly, the corresponding product will also have defects. Therefore, the standard level of operation of printing personnel will also directly affect the quality of printed products. Follow us http://www.xinfengyinshua.cn Learn more!