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画册印刷掉版的原因

来源:http://www.xinfengyinshua.cn/   发布时间:2021-08-13
在画册印刷中,由于各种原因导致印刷过程中出现掉版现象,导致这种问题出现的原因有很多,今天,就给大家具体介绍一下画册印刷掉版的原因。
In the process of album printing, due to various reasons, there are many reasons for this problem. Today, let's introduce the reasons for the loss of album printing.
1、版面水分大小控制不当。
1. Improper control of page moisture size.
如果版面水分过大,就是使版面及墨辊带有一层较厚的水膜,进而影响油墨的正常均匀转移和涂布,这样就容易引起掉版现象,而且版面水分过大还会使印刷墨色偏淡,对此如果盲目采取增加输墨量来提高墨色浓度的话,则会因水大墨大造成乳化过度,而且如果版面水分偏小,则无法与油墨抗衡,使版面油墨层铺展,也会引起糊版现象。
If the water content of the layout is too large, it means that the layout and ink roller have a thick water film, which will affect the normal and uniform transfer and coating of ink, which is easy to cause plate loss. Moreover, if the water content of the layout is too large, the printing ink will be lighter. Therefore, if we blindly increase the ink delivery to improve the ink concentration, it will cause excessive emulsification due to large water and ink, Moreover, if the moisture content of the layout is too small, it can not compete with the ink, so that the ink layer of the layout will spread, which will also cause the phenomenon of paste.
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2、润版液酸碱度太强。
2. The pH of fountain solution is too strong.
如果润版液酸性太强的话就会腐蚀画册印刷砂目,破坏印版的亲水层,容易使印刷图文在压印刷过程中被磨掉,因此,润版液的PH值在5左右刚刚好。
If the acid of the fountain solution is too strong, it will corrode the sand mesh of the album printing, destroy the hydrophilic layer of the printing plate, and it is easy to grind off the printed pictures and texts in the press printing process. Therefore, the pH value of the fountain solution is just about 5.
2、油墨粘度过大。
2. The ink viscosity is too high.
胶印过程中如果油墨的粘度过大,除了使油墨转印出现困难以外,还会破坏墨层中间断裂的条件,使版面剩余的墨层不足,其结果就会使印版图文部分裸露磨损,造成掉版。
In the offset printing process, if the viscosity of the ink is too large, in addition to making the ink transfer difficult, it will also destroy the conditions of fracture in the middle of the ink layer and make the remaining ink layer of the layout insufficient. As a result, the graphic part of the printing plate will be exposed and worn, resulting in plate loss.
4、着墨辊老化。
4. Aging of inking roller.
着墨辊老化后,亲水性能就会增强,而亲油墨的性能就会减弱,导致传递油墨的性能差,在机械滚压的过程中,形成“水包油”类型的油墨乳化,之后导致印版油腻和武汉画册印刷图文部分掉版。
After the aging of the inking roller, the hydrophilic performance will be enhanced, while the performance of the hydrophilic ink will be weakened, resulting in poor performance of the transfer ink. In the process of mechanical rolling, an ink emulsion of "oil in water" type will be formed, which will later lead to greasy printing plates and loss of printing pictures and texts in Wuhan album.
5、设备老化。
5. Equipment aging.
当设备使用老化时,一些关键部件润滑不好造成磨损、松动,如滚筒轴头、轴瓦、齿轮部件、偏心套等。那么,滚筒在合压过程中,便容易产生微量的颤动或滑动现象,从而加剧对印版版面摩擦磨损,致使印迹转移过程中挤压变形间接引起掉版、糊版的现象的产生。
When the equipment is aging, some key parts are not well lubricated, resulting in wear and looseness, such as roller bearing head, bearing bush, gear parts, eccentric sleeve, etc. Then, in the process of pressing, the drum is easy to produce a small amount of vibration or sliding, which intensifies the friction and wear of the printing plate, resulting in the extrusion deformation in the process of imprint transfer, which indirectly causes the phenomenon of plate falling and pasting.
另外,橡皮布不平整也会导致画册印刷出现掉版的现象。当橡皮布的衬垫不平或包勒不紧出现虚松情况时,其表面产生隆起现象,压印时产生不正常的摩擦而破坏印版膜层,从而引起掉版、糊版现象的产生。
In addition, the uneven blanket will also lead to the phenomenon of plate loss in album printing. When the blanket pad is uneven or the package is not tight, and there is virtual looseness, the surface will bulge, and abnormal friction will occur during embossing to damage the plate film, resulting in plate dropping and plate pasting.
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