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          畫冊印刷掉版的原因

          來源:http://www.mosstuckerlaw.com/   發布時間:2021-08-13
          在畫冊印刷中,由于各種原因導致印刷過程中出現掉版現象,導致這種問題出現的原因有很多,今天,就給大家具體介紹一下畫冊印刷掉版的原因。
          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當。
          1. Improper control of page moisture size.
          如果版面水分過大,就是使版面及墨輥帶有一層較厚的水膜,進而影響油墨的正常均勻轉移和涂布,這樣就容易引起掉版現象,而且版面水分過大還會使印刷墨色偏淡,對此如果盲目采取增加輸墨量來提高墨色濃度的話,則會因水大墨大造成乳化過度,而且如果版面水分偏小,則無法與油墨抗衡,使版面油墨層鋪展,也會引起糊版現象。
          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.
          濟南畫冊印刷
          2、潤版液酸堿度太強。
          2. The pH of fountain solution is too strong.
          如果潤版液酸性太強的話就會腐蝕畫冊印刷砂目,破壞印版的親水層,容易使印刷圖文在壓印刷過程中被磨掉,因此,潤版液的PH值在5左右剛剛好。
          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、油墨粘度過大。
          2. The ink viscosity is too high.
          膠印過程中如果油墨的粘度過大,除了使油墨轉印出現困難以外,還會破壞墨層中間斷裂的條件,使版面剩余的墨層不足,其結果就會使印版圖文部分裸露磨損,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、著墨輥老化。
          4. Aging of inking roller.
          著墨輥老化后,親水性能就會增強,而親油墨的性能就會減弱,導致傳遞油墨的性能差,在機械滾壓的過程中,形成“水包油”類型的油墨乳化,之后導致印版油膩和武漢畫冊印刷圖文部分掉版。
          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、設備老化。
          5. Equipment aging.
          當設備使用老化時,一些關鍵部件潤滑不好造成磨損、松動,如滾筒軸頭、軸瓦、齒輪部件、偏心套等。那么,滾筒在合壓過程中,便容易產生微量的顫動或滑動現象,從而加劇對印版版面摩擦磨損,致使印跡轉移過程中擠壓變形間接引起掉版、糊版的現象的產生。
          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,橡皮布不平整也會導致畫冊印刷出現掉版的現象。當橡皮布的襯墊不平或包勒不緊出現虛松情況時,其表面產生隆起現象,壓印時產生不正常的摩擦而破壞印版膜層,從而引起掉版、糊版現象的產生。
          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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