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平版膠印印刷流程第四步

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-09-27 | 417 Views | Share:
平版膠印印刷流程第四步
平版膠印印刷流程第四步


印刷

樣張檢驗合格,並由委印人簽批後,即可曬制供印刷用的印版,交付印刷工序上機印刷。膠印印刷製版的成本較低,大約只有凹印的十分之一。膠印印刷壓力小,機器印刷平穩,有利於提高印刷速度。目前的單張紙膠印機可以達到每小時18000,而捲筒紙膠印機可以達到每小時50000印。

膠印印刷壓力過大時,會產生網點增大現象,使畫面階調變深;潤濕用水過大時,會使油墨乳化,從而降低印刷顏色的鮮艷性。當水墨失去平衡時,印張上的圖文墨色變淺,印跡發花、套印不準、紙張掉毛掉粉,嚴重時會造成質量下降,甚出現廢品。

為了剋服潤版液對印刷質量產生的不利影響
,對膠印用紙提出了較高的要求。以前適用於凸版印刷的凸版紙也因為凸版印刷逐漸淡出而基本為膠版紙所替代。原來膠印需要使用定量重的銅版紙現在也向輕量化轉換。
印刷仍以高速多色單張紙膠印機及捲筒紙膠印機為主流。

平版
膠印的印刷工藝經過多年的發展已經穩定,印刷的質量已經能夠得到出版社和讀者的認可,印刷品的價格和印製周期也逐漸為各方所接受、認可。數字印刷技術及設備越來越到一些快印廠家的青睞。

目前的數字印刷技術主要包括墨粉型的電子照相類印刷技術和
以噴墨為主的數碼印刷技術。作為數字工作流進行控制的機上製版印刷也劃歸數字印刷的領域。這種印刷工藝在膠印機上進行製版,製版完畢,即可開機印刷。

平版膠印印刷流程第四步
平版膠印印刷流程第四步

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