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BuKePrinting >> knowledge >> 關於印刷廠的蛋白版和多層金屬版

關於印刷廠的蛋白版和多層金屬版

From:Buke printing factory of China深圳步殼印刷廠 | Author:China Bukeprinting factorybook0755 | Published time: 2020-07-26 | 592 Views | Share:
蛋白版是在經過研磨已有砂目的金屬鋅板上,塗布一層由蛋白、重鉻酸銨和氨水配置而成的感光液,烘乾後和陰圖底片一起放入曬版機內進行曝光。由於是陰圖曬版,圖文部分透光、受到光線照射的感光層硬化,便形成了親油的圖文。再經過擦顯影墨,用水沖去未見光的空白部分的膠膜和腐蝕等處理,使空白部分具有親水性,最後塗布阿拉伯膠蛋白版成本低,操作簡單,但硬化的感光層耐酸、耐鹼性較差,且高出版面,圖文的印力低,適合數量少的印刷產品。

關於印刷廠的蛋白版和多層金屬版

蛋白版

蛋白版是在經過研磨已有砂目的金屬鋅板上,塗布一層由蛋白、重鉻酸銨和氨水配置而成的感光液,烘乾後和陰圖底片一起放入曬版機內進行曝光。由於是陰圖曬版,圖文部分透光、受到光線照射的感光層硬化,便形成了親油的圖文。再經過擦顯影墨,用水沖去未見光的空白部分的膠膜和腐蝕等處理,使空白部分具有親水性,最後塗布阿拉伯膠蛋白版成本低,操作簡單,但硬化的感光層耐酸、耐鹼性較差,且高出版面,圖文的印力低,適合數量少的印刷產品。

 

多層金屬版

按照圖文凹下或凸起的形態分為平凹版和平凸版,使用較多的是平凹版。銅金屬上鍍鉻製成二層平凹版。鐵金屬上鍍銅再鍍鉻便製成了三層平凹版多層金屬版選用親油性良好的金屬銅和親水性良好的金屬,印版上形成穩定的圖文部分和空白部分,耐印力很高。但是,其製版周期長、成本高,階調、色彩再現性不如FS版適合印刷數量很大的鈔券底紋和包裝材料等印刷品。

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