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BuKePrinting >> Questions >> 什麽是印刷廠的平凹版

什麽是印刷廠的平凹版

From:Buke printing factory of China深圳步殼印刷廠 | Author:China Bukeprinting factorybook0755 | Published time: 2020-07-26 | 641 Views | Share:
印刷廠平凹版是用陽圖底片曬制的印版。

什麽是印刷廠的平凹版

印刷廠平凹版是用陽圖底片曬制的印版。

把經過磨版和前腐蝕的鋅板或鋁板,在其錶面塗布感光膠,經烘乾與陽圖底片一起放曬版機內進行曝光。

印版上空白部分的感光膠膜受到光線照射發生光化學反應而硬化,圖文部分未感光的膠膜,經顯影被除掉,露出金屬面再用腐蝕液對金屬略加腐蝕,然後塗上親油的基漆(蠟光),形成了親油疏水的圖文部分。

平凹版的圖文部分形成以後,除去版面硬化的感光膜並用磷酸液加以處理,再塗布親水的阿拉伯膠,形成了親水疏油的空白部分。

平凹版為即塗版,使用的感光膠由聚乙烯醇、重鉻酸銨等物質組成,印版的製版工藝復雜,質量不易控制,階調、色彩再現性也不如PS版好。

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