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BuKePrinting >> Questions >> 膠印的基本原理 ​

膠印的基本原理 ​

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-09-12 | 382 Views | Share:
膠印是平版印刷的主要方式之一。平版印刷的版面和凸印、凹印版面的不同之處就在於它的著墨部分和非著墨部分都處在同一個平面上。

膠印的基本原理

膠印是平版印刷的主要方式之一。平版印刷的版面和凸印、凹印版面的不同之處就在於它的著墨部分和非著墨部分都處在同一個平面上。

假如在這個平面上只是塗布油墨,就會使圖文部分和空白部分難以區分,壓印之後所能獲得的僅是滿幅油墨。


膠印的基本原理
膠印的基本原理

為了在平版印刷中獲得理想的印刷效果,膠印利用了水和油墨互相排斥的基本原理,通過對印版滾筒著水、著墨而進行工作。

在壓印之前,首先向印版塗布水分,使印版錶面的空白部分吸水,然後再向印版塗布油墨使印版錶面的圖文上墨。由於水分和油墨相互抗拒,所以就保持了印版的空白部分有水無墨,而印版的圖文部分則有墨無水。

滾筒印刷時,印版上圖文處的墨跡首先被轉印到富有彈性的橡皮滾筒錶面,然後再由橡皮滾筒把圖文轉印到壓印錶面的紙張上。

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