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影響凹版印刷油墨轉移的五大因素,不容錯過!
作者:admin 來源:http://fashionalized.com 發布時間:2019-4-23 13:34:29 瀏覽次數:196
從油墨的角度來看印刷過程,印刷其實就是油墨從印版到承印物的一個轉移過程。探討油墨轉移過程中的規律對我們印刷設計和實際印刷操作是非常重要的。濟南書刊乐天堂国际官网從多年印刷上機操作實踐和理論探索中,總結出以下因素對油墨轉移量有影響。
From the perspective of ink, printing is actually a transfer process of ink from plate to substrate. It is very important for our printing design and actual printing operation to discuss the law of ink transfer process. From years of practice and theoretical exploration on printing operation, Jinan publications and magazines printing summarized the following factors affecting ink transfer.
1、網穴形狀
1. Cave Shape
形成網穴主要運用化學腐蝕法或電子機械雕刻法,它們形成網穴的形狀是不同的:腐蝕網點形狀呈“U”形,電子機械雕刻網點呈“V”形。生產方法不同,單個網穴的容積也不一樣,油墨存儲量也不一樣,前者大于后者,因此印刷油墨轉移量也是前者大于后者。腐蝕版一般因轉移量大而用于文字線條較多的PTP鋁箔印刷,而電子機械雕刻版因網點變化較多而且重復性好,因此應用于圖案較復雜的塑料薄膜彩色印刷。
Chemical etching or electronic mechanical sculpture are used to form meshes. The shapes of these meshes are different: the corrosion meshes are U-shaped, and the electronic mechanical sculpture meshes are V-shaped. Different production methods, the volume of a single hole is also different, the ink storage is also different, the former is greater than the latter, so the transfer of printing ink is also greater than the latter. Corrosion plate is usually used for PTP foil printing with more lines because of its large amount of transfer, while electromechanical engraving plate is used for color printing of plastic film with more complex patterns because of the variety of dots and good repeatability.
2、油墨顆粒細度
2. Fineness of Ink Particles
油墨顆粒越細,進入印刷上網穴的油墨顆粒就越多,從而轉移量就越多。一般油墨顆粒細度為10-20?m。
The finer the ink particles are, the more ink particles enter the printing hole, and the more the transfer amount is. Generally, the fineness of ink particles is 10-20?M.
3、油墨的粘度
3. Viscosity of Ink

油墨的粘度在油墨轉移過程中也非常重要,在薄膜復合彩印生產中油墨粘度控制在13-25S(3號Zahn杯)。在此范圍內,隨著粘度升高,轉移量增大。再增大粘度,因油墨表面張力加大難以進入網穴,從而使轉移量下降;若粘度過小,溶劑過多,單位體積內油墨顆粒下降,從而轉移量也下降,甚至有可能引起色相偏差太大而產生質量事故。

濟南書刊乐天堂国际官网

Ink viscosity is also very important in the process of ink transfer. Ink viscosity is controlled at 13-25S (No. 3 Zahn cup) in the production of film composite color printing. Within this range, the transfer amount increases with the increase of viscosity. If the viscosity is too small and the solvent is too much, the ink particles in the unit volume will decrease, thus the transfer amount will decrease, and even the color deviation will be too large, which may lead to quality accidents.
4、刮刀角度、壓力和刮刀接觸點到壓印點的距離
4. Scraper Angle, Pressure and Distance from Scraper Contact Point to Impression Point
刮刀角度越大,壓力越大,刮去網穴中的油墨越多,從而油墨轉移量減少。刮刀與印版的接觸點到壓印點(壓輥與印版輥筒的接觸點)的距離越遠,網穴中的油墨在與承印物接觸之前干燥的時間增加,從而粘度上升,增加了轉移困難,下降了轉移量。
The greater the angle of the scraper, the greater the pressure, and the more ink in the mesh hole is scraped, thus reducing the amount of ink transfer. The longer the distance between the contact point between scraper and plate (the contact point between roller and plate roller) is, the longer the drying time of ink in the hole increases before contact with the substrate, thus increasing the viscosity, increasing the difficulty of transfer and reducing the amount of transfer.
5、印刷速度
5. Printing Speed
速度越快,油墨轉移量越大。原因有二:一是網穴中油墨在轉移之前干燥時間縮短,粘度變化不大;二是在刮刀壓力不變的情況下,網穴中油墨量增加,從而轉移量增大。因此,在能保證印刷質量的情況下盡量提高印刷速度。軟包裝復合里印速度一般為80-150m/min。
The faster the speed, the greater the ink transfer. There are two reasons: first, the drying time of the ink in the mesh hole is shortened before the transfer, and the viscosity changes little; second, the amount of ink in the mesh hole increases with the constant pressure of the scraper, thus the transfer amount increases. Therefore, in order to ensure the quality of printing, we should try our best to improve the printing speed. The composite printing speed of flexible packaging is generally 80-150 m/min.
好了,今天由濟南書刊乐天堂国际官网帶來的精彩內容就給大家介紹到這里了,希望通過我們的講解對大家有所幫助!我們的官網是:http://fashionalized.com!謝謝大家的支持!
Well, today's wonderful content from Jinan magazine printing will be introduced to you here, I hope that through our explanation to help you all!  Our official website is: http://fashionalized.com! Thank you for your support!