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畫冊印刷工廠滾筒壓力校正問題

From:Buke printing factory of China深圳步殼印刷廠 | Author:China Bukeprinting factorybook0755 | Published time: 2020-07-17 | 515 Views | 🔊 Click to read aloud ❚❚ | Share:
畫冊印刷工廠印刷滾筒壓力校正不合適而引起的問題主要有以下幾點:
畫冊印刷工廠滾筒壓力校正問題

畫冊印刷工廠印刷滾筒壓力校正不合適而引起的問題主要有以下幾點:

(1)印版滾筒與橡皮滾筒壓力過輕。印刷滾筒間的壓力是在機器設計時確定的,並以此為依據製造一定的直徑的滾筒,選用規定的包襯,每一種型號規格的機器都有一定的印刷壓力。若壓力過輕,印版上的圖文墨跡就不能很好地、完整地傳給橡皮滾筒,造成印品上的圖文網點丟失、不光潔、不完整、局部發花等現象

(2)橡皮滾筒與壓印滾筒壓力過輕。若橡皮滾筒與壓印滾筒的壓力過輕,橡皮布上的圖文墨層就不能很好地轉印到紙張上,造成印品圖文網點發虛,不夠實在。特別在印品印刷實地部位出現發虛不實的現象,使印品達不到質量要求

(3)印版滾筒與橡皮滾筒壓力過重。若印版滾筒與橡皮滾筒的壓力過重,印版上圖文墨層發生擴大,造成網點變形增大,層次不清楚。壓力過重還容易破壞印版砂眼和圖文基礎,降低空白部分的親水性和圖文部分的親油性,造成臟版和花版,印版磨損、耐印力下降等現象

(4)橡皮滾筒與壓印滾筒壓力過重。橡皮滾筒與壓印滾筒的壓力過重會促使紙張變形造成套印不準,因為紙張受壓後,會產生塑性變形,其變形的程度取決於紙張的變形特性和壓力的大小。

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