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画册印刷掉版的五大原因

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

In the printing process of picture albums, there are many reasons for the phenomenon of plate loss due to various reasons. Today, I will give you a specific introduction to the reasons for plate loss in Jinan picture album printing.

1、版面水分大小控制不当。

1. Improper control of moisture content in the layout.

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 moisture content of the layout is too high, it means that the layout and ink rollers have a thick layer of water film, which affects the normal and uniform transfer and coating of ink. This can easily cause plate loss, and excessive moisture content of the layout can also make the printing ink color lighter. If blindly increasing the ink output to increase the ink concentration, it will cause excessive emulsification due to high water content and ink, and if the moisture content of the layout is too small, it will not be able to compete with the ink, Spreading the ink layer on the layout can also cause a paste phenomenon.

2、润版液酸碱度太强。

2. The acidity and alkalinity of the fountain solution are 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 acidity of the fountain solution is too strong, it will corrode the sand mesh of the album printing, damage the hydrophilic layer of the printing plate, and easily cause the printed images and texts to be worn off during the pressure printing process. Therefore, the pH value of the fountain solution is just around 5.

2、油墨粘度过大。

2. 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。

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