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印版出现白裂现象的原因

文章作者:华政印务 发布时间:2022-03-05
印版的白裂现象在画册印刷中经常发生,出现这种现象不仅会影响产品的质量,还会给印刷厂家造成不必要的损失,是什么原因导致的呢?下面,我们就一起了解一下。
The white crack of printing plate often occurs in album printing. This phenomenon will not only affect the quality of products, but also cause unnecessary losses to printing manufacturers. What is the reason? Now, let's have a look.
1、点式白化。
1. Dot whitening.
进油墨体系对蜡类的表面剂类互溶性差造成的,或者是因为油墨结皮之后在印刷的过程中未被复溶而被转移到图文上。
It is caused by the poor mutual solubility of wax surfactants in the ink system, or it is transferred to the picture and text because the ink is not re dissolved in the printing process after skinning.
2、点式白点。
2. Dot white dot.
油墨静电或者承印物静电造成的,或者因稀释溶剂产生的静电造成的。一般在气温高或者印刷速度快的时候发生,其次复膜的时候前紧后松或者前松后紧,而静电的引起常见于湿度大的天气。
Caused by static electricity or solvent dilution of printing ink. It usually occurs when the temperature is high or the printing speed is fast. Secondly, when laminating, it is tight before loosening or loose before tightening. The cause of static electricity is common in high humidity weather.
3、裂纹式白化。
3. Crack whitening.
油墨转移性能太差,或者印版图纹太浅而比较容易使油墨体系中的溶剂挥发太快,一般印迹粗糙导致成膜不良,特别是油墨体系或者墨斗稀释剂的加入吸入了水分而出现的白化,大多出现在夏季车间湿度太高的环境中。
The ink transfer performance is too poor, or the printing plate pattern is too shallow, which is easy to volatilize the solvent in the ink system too quickly. Generally, the rough impression leads to poor film formation, especially the whitening caused by the addition of water in the ink system or ink bucket diluent, which mostly occurs in the environment with too high humidity in the workshop in summer.
4、整块印迹的白化。
4. Whitening of the whole imprint.
在连续印刷时间过长,操作者在发现油墨粘度变粘或者变厚的时候,重复加入某一种单一溶剂,从而打破原有油墨体系中混合溶剂的挥发递度平衡,造成印刷油墨成膜的时候墨层粗糙、泛白。
When the continuous printing time is too long, when the operator finds that the ink viscosity becomes sticky or thicker, he repeatedly adds a single solvent, so as to break the volatile transfer balance of the mixed solvent in the original ink system, resulting in rough and white ink layer when the printing ink is formed.
另外,在操作过程中过量的加入混合溶剂,往往会使油墨中合成树脂的含量相对减少,也会导致印版出现白裂现象。
In addition, the excessive addition of mixed solvents in the operation process will often reduce the content of synthetic resin in the ink and lead to white cracks in the printing plate.

声明:文章来源于https://www.sdhzyw.com/

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