|
|
簡析紙箱印刷版材特性 |
雙擊自動滾屏 |
發布者:admin
發布時間:2020-4-6 閱讀:2303次 【字體:大
中 小】 |
紙箱印刷版材分金屬類和非金屬類兩大類,常用的工藝主要涉及凹印、柔印(凸印)和平印三種,由于印版的特性不同,其印刷效果、生產成本也有所差異。 凹印版的特性 凹印版材是采用鋼輥材料(無縫鋼管或卷板)經過電鍍、電雕等加工工藝制作而成,凹印工藝設備投資高、制版工藝復雜、制版費用高,換版操作也比較麻煩,而且還存在著一定的污染問題。但是,凹印產品墨層厚實、均勻,印品層次豐富,質感強,印品墨色干燥速度快,另外,它還具有印刷速度快、印刷墨色質量比較穩定、不容易產生印刷色差和印版耐印率較高的優點,若用于印刷數量特別大的電子、醫藥、食品和香煙等包裝產品,可較好地降低生產成本。 版的特性 平印工藝PS版的基材是鋁,版材較脆,容易拉伸變形和折裂。但是,它的親水親油性能都比較好,且雙重性質較接近。由于鋁的表面有一層致密的氧化膜,具有一定的化學穩定性,并具有一定的硬度和耐磨性,經過工藝處理以后,它的親水性和親油性都會得到較好的提高。PS版是目前預印紙箱的主要印刷版材,由于它的制版工藝簡便、快捷,裝版操作十分方便。它既可印刷實地版、線條版,又可印刷精細的網紋版,且印刷再現效果好,印刷價格相對比較便宜,廣泛用于印刷紙箱面紙和紙盒等包裝產品。 橡皮版的特性 橡(xiang)(xiang)(xiang)皮版(ban)(ban)(ban)(ban)(ban)(ban)是柔性(xing)(xing)版(ban)(ban)(ban)(ban)(ban)(ban)印(yin)刷(shua)(shua)工(gong)藝的(de)(de)常用(yong)(yong)(yong)版(ban)(ban)(ban)(ban)(ban)(ban)材,由于(yu)它(ta)的(de)(de)材質(zhi)柔軟,廣泛用(yong)(yong)(yong)于(yu)對瓦(wa)楞紙板的(de)(de)直接印(yin)刷(shua)(shua)。橡(xiang)(xiang)(xiang)皮版(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)主要(yao)材料是天然(ran)橡(xiang)(xiang)(xiang)膠和合(he)成橡(xiang)(xiang)(xiang)膠。其制(zhi)版(ban)(ban)(ban)(ban)(ban)(ban)方式(shi)有(you)采用(yong)(yong)(yong)手(shou)工(gong)雕(diao)(diao)刻(ke)、激光雕(diao)(diao)刻(ke)和鑄造制(zhi)版(ban)(ban)(ban)(ban)(ban)(ban)三(san)種。在使(shi)用(yong)(yong)(yong)橡(xiang)(xiang)(xiang)皮版(ban)(ban)(ban)(ban)(ban)(ban)時(shi),應注意它(ta)的(de)(de)印(yin)刷(shua)(shua)適性(xing)(xing),如從橡(xiang)(xiang)(xiang)膠的(de)(de)親墨(mo)性(xing)(xing)、傳墨(mo)性(xing)(xing)、覆蓋力和再現性(xing)(xing)方面考慮,使(shi)用(yong)(yong)(yong)水(shui)基型(xing)油(you)墨(mo)印(yin)刷(shua)(shua),用(yong)(yong)(yong)天然(ran)橡(xiang)(xiang)(xiang)膠版(ban)(ban)(ban)(ban)(ban)(ban)材比合(he)成橡(xiang)(xiang)(xiang)膠版(ban)(ban)(ban)(ban)(ban)(ban)材要(yao)好。丁基橡(xiang)(xiang)(xiang)膠版(ban)(ban)(ban)(ban)(ban)(ban)材則較適合(he)于(yu)使(shi)用(yong)(yong)(yong)溶劑(ji)型(xing)油(you)墨(mo)。丁腈橡(xiang)(xiang)(xiang)膠版(ban)(ban)(ban)(ban)(ban)(ban)材應盡量避(bi)免使(shi)用(yong)(yong)(yong)溶劑(ji)型(xing)油(you)墨(mo),以防止印(yin)版(ban)(ban)(ban)(ban)(ban)(ban)被溶劑(ji)腐蝕破壞。橡(xiang)(xiang)(xiang)皮版(ban)(ban)(ban)(ban)(ban)(ban)既(ji)可印(yin)刷(shua)(shua)表面粗糙的(de)(de)承印(yin)物,又可在質(zhi)地(di)較硬的(de)(de)材料上進行(xing)印(yin)刷(shua)(shua),且(qie)具有(you)較高(gao)的(de)(de)耐印(yin)力。但是,它(ta)存在容易變形(xing)的(de)(de)弊(bi)病,故不適宜印(yin)刷(shua)(shua)高(gao)精度(du)的(de)(de)產品。 |
|
|
|
|