印版的白裂現(xiàn)象在畫冊印刷中經(jīng)常發(fā)生，出現(xiàn)這種現(xiàn)象不僅會影響產品的質量，還會給印刷廠家造成不必要的損失，是什么原因導致的呢？下面，我們就一起了解一下。
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、點式白化。
1. Dot whitening.
進油墨體系對蠟類的表面劑類互溶性差造成的，或者是因為油墨結皮之后在印刷的過程中未被復溶而被轉移到圖文上。
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、點式白點。
2. Dot white dot.
油墨靜電或者承印物靜電造成的，或者因稀釋溶劑產生的靜電造成的。一般在氣溫高或者印刷速度快的時候發(fā)生，其次復膜的時候前緊后松或者前松后緊，而靜電的引起常見于濕度大的天氣。
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、裂紋式白化。
3. Crack whitening.
油墨轉移性能太差，或者印版圖紋太淺而比較容易使油墨體系中的溶劑揮發(fā)太快，一般印跡粗糙導致成膜不良，特別是油墨體系或者墨斗稀釋劑的加入吸入了水分而出現(xiàn)的白化，大多出現(xiàn)在夏季車間濕度太高的環(huán)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、整塊印跡的白化。
4. Whitening of the whole imprint.
在連續(xù)印刷時間過長，操作者在發(fā)現(xiàn)油墨粘度變粘或者變厚的時候，重復加入某一種單一溶劑，從而打破原有油墨體系中混合溶劑的揮發(fā)遞度平衡，造成印刷油墨成膜的時候墨層粗糙、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，在操作過程中過量的加入混合溶劑，往往會使油墨中合成樹脂的含量相對減少，也會導致印版出現(xiàn)白裂現(xiàn)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.
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