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(dāng)。

1. Improper control of moisture content in the layout.

如果版面水分過(guò)大，就是使版面及墨輥帶有一層較厚的水膜，進(jìn)而影響油墨的正常均勻轉(zhuǎn)移和涂布，這樣就容易引起掉版現(xiàn)象，而且版面水分過(guò)大還會(huì)使印刷墨色偏淡，對(duì)此如果盲目采取增加輸墨量來(lái)提高墨色濃度的話，則會(huì)因水大墨大造成乳化過(guò)度，而且如果版面水分偏小，則無(wú)法與油墨抗衡，使版面油墨層鋪展，也會(huì)引起糊版現(xiàn)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(rùn)版液酸堿度太強(qiáng)。

2. Fountain solution pH is too strong.

如果潤(rùn)版液酸性太強(qiáng)的話就會(huì)腐蝕畫(huà)冊(cè)印刷砂目，破壞印版的親水層，容易使印刷圖文在壓印刷過(guò)程中被磨掉，因此，潤(rùn)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(guò)大。

2. Ink viscosity is too high.

膠印過(guò)程中如果油墨的粘度過(guò)大，除了使油墨轉(zhuǎn)印出現(xiàn)困難以外，還會(huì)破壞墨層中間斷裂的條件，使版面剩余的墨層不足，其結(jié)果就會(huì)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(huì)增強(qiáng)，而親油墨的性能就會(huì)減弱，導(dǎo)致傳遞油墨的性能差，在機(jī)械滾壓的過(guò)程中，形成“水包油”類型的油墨乳化，之后導(dǎo)致印版油膩和武漢畫(huà)冊(cè)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(shè)備老化。

5. Equipment aging.

當(dāng)設(shè)備使用老化時(shí)，一些關(guān)鍵部件潤(rùn)滑不良造成磨損、松動(dòng)，如滾筒軸頭、軸瓦、齒輪部件、偏心套等。那么，滾筒在合壓過(guò)程中，便容易產(chǎn)生微量的顫動(dòng)或滑動(dòng)現(xiàn)象，從而加劇對(duì)印版版面摩擦磨損，致使印跡轉(zhuǎn)移過(guò)程中擠壓變形間接引起掉版、糊版的現(xiàn)象的產(chǎn)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(huì)導(dǎo)致畫(huà)冊(cè)印刷出現(xiàn)掉版的現(xiàn)象。當(dāng)橡皮布的襯墊不平或包勒不緊出現(xiàn)虛松情況時(shí)，其表面產(chǎn)生隆起現(xiàn)象，壓印時(shí)產(chǎn)生不正常的摩擦而破壞印版膜層，從而引起掉版、糊版現(xiàn)象的產(chǎn)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.