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影响凹版印刷油墨转移的五大因素,不容错过!
作者:admin 来源:http://www.sdhzyw.com 发布时间:2019-4-23 13:34:29 浏览次数:357
从油墨的角度来看印刷过程,印刷其实就是油墨从印版到承印物的一个转移过程。探讨油墨转移过程中的规律对我们印刷设计和实际印刷操作是非常重要的。济南书刊杂志印刷从多年印刷上机操作实践和理论探索中,总结出以下因素对油墨转移量有影响。
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、网穴形状
1. Cave Shape
形成网穴主要运用化学腐蚀法或电子机械雕刻法,它们形成网穴的形状是不同的:腐蚀网点形状呈“U”形,电子机械雕刻网点呈“V”形。生产方法不同,单个网穴的容积也不一样,油墨存储量也不一样,前者大于后者,因此印刷油墨转移量也是前者大于后者。腐蚀版一般因转移量大而用于文字线条较多的PTP铝箔印刷,而电子机械雕刻版因网点变化较多而且重复性好,因此应用于图案较复杂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、油墨颗粒细度
2. Fineness of Ink Particles
油墨颗粒越细,进入印刷上网穴的油墨颗粒就越多,从而转移量就越多。一般油墨颗粒细度为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

油墨的粘度在油墨转移过程中也非常重要,在薄膜复合彩印生产中油墨粘度控制在13-25S(3号Zahn杯)。在此范围内,随着粘度升高,转移量增大。再增大粘度,因油墨表面张力加大难以进入网穴,从而使转移量下降;若粘度过小,溶剂过多,单位体积内油墨颗粒下降,从而转移量也下降,甚至有可能引起色相偏差太大而产生质量事故。

济南书刊杂志印刷

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、压力和刮刀接触点到压印点的距离
4. Scraper Angle, Pressure and Distance from Scraper Contact Point to Impression Point
刮刀角度越大,压力越大,刮去网穴中的油墨越多,从而油墨转移量减少。刮刀与印版的接触点到压印点(压辊与印版辊筒的接触点)的距离越远,网穴中的油墨在与承印物接触之前干燥的时间增加,从而粘度上升,增加了转移困难,下降了转移量。
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,油墨转移量越大。原因有二:一是网穴中油墨在转移之前干燥时间缩短,粘度变化不大;二是在刮刀压力不变的情况下,网穴中油墨量增加,从而转移量增大。因此,在能保证印刷质量的情况下尽量提高印刷速度。软包装复合里印速度一般为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,今天由济南书刊杂志印刷带来的精彩内容就给大家介绍到这里了,希望通过我们的讲解对大家有所帮助!我们的官网是:http://www.sdhzyw.com!谢谢大家的支持!
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://www.sdhzyw.com! Thank you for your support!