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    濟南畫冊印刷掉版的原因是什么?

    來源:http://www.mbtshoesclearanceinc.com/   發布時間:2021-03-29
    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 album printing, due to various reasons, there are many reasons for this kind of problem. Today, I'll give you a detailed introduction of the reasons for the printing of album.
    1、版面水分大小控制不當。
    1. Improper control of moisture content in the layout.
    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 moisture 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 uniform transfer and coating of the ink. In this way, it is easy to cause plate dropping, and the excessive moisture content of the layout will make the printing ink lighter. If we blindly increase the ink flow to improve the ink concentration, it will cause excessive emulsification due to the large amount of water and ink Surface moisture is too small, it can not compete with the ink, so that the layout of the ink layer spread, will also cause paste version phenomenon.
    2、潤版液酸堿度太強。
    2. Fountain solution pH 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 fountain solution is too acidic, it will corrode the album printing sand, destroy the hydrophilic layer of the printing plate, and easily make the printed text and text be worn off in the process of pressure printing. Therefore, the pH value of the fountain solution is just about 5.
    2、油墨粘度過大。
    2. 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 high, in addition to making it difficult to transfer the ink, it will also damage the condition of fracture in the middle of the ink layer, so that the remaining ink layer of the layout is insufficient. As a result, the graphic part of the printing plate will be exposed and worn, resulting in plate dropping.
    4、著墨輥老化。
    4. Ink roller aging.
    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 ink roller aging, the hydrophilic performance will be enhanced, and the hydrophilic ink performance will be weakened, resulting in poor transfer ink performance. In the process of mechanical rolling, the "oil in water" type of ink emulsification will be formed, and then the printing plate will be greasy and the printing image and text part of Wuhan picture album will be lost.
    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良造成磨損、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 worn and loose due to poor lubrication, such as roller bearing head, bearing bush, gear parts, eccentric sleeve, etc. Then, in the process of pressing, the cylinder is easy to produce a small amount of vibration or sliding phenomenon, which aggravates 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 drop and paste.
    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 album printing out of the phenomenon. When the blanket cushion is uneven or the package is not tight, there is a virtual loose situation, the surface of the bulge phenomenon, abnormal friction and damage to the plate film during imprinting, resulting in plate drop, paste phenomenon.
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