筆記本內頁印刷的知識點
筆記本印刷涵蓋了幾種主要的印(yin)刷方(fang)式(shi),在(zai)制(zhi)版(ban)(ban)階段.根(gen)據(ju)不(bu)同(tong)的產品性質(zhi),選擇不(bu)同(tong)的印(yin)刷方(fang)式(shi),針對不(bu)同(tong)的印(yin)刷方(fang)式(shi),制(zhi)版(ban)(ban)工藝也有所不(bu)同(tong)。柔性版(ban)(ban)制(zhi)版(ban)(ban)工藝流(liu)程為(wei):原(yuan)稿(gao)一(yi)(yi)(yi)菲(fei)林(lin)(陰片(pian))一(yi)(yi)(yi)曝光一(yi)(yi)(yi)沖洗一(yi)(yi)(yi)烘干一(yi)(yi)(yi)后處理(li)。
1.筆記本印刷原稿
適合(he)柔性印(yin)刷的原(yuan)稿設計應具備(bei)如下(xia)特點:色數多.但(dan)疊印(yin)少;不要求再現(xian)特別小的細節(jie);網線不太高,但(dan)能取得彩色印(yin)刷效(xiao)果;可以聯機做包裝加工。
2.筆記本印刷菲林(陰片)
符合制版需要,圖文(wen)清晰、尺寸大小(xiao)規格準確;用(yong)磨砂菲(fei)林(lin),要求菲(fei)林(lin)四角密(mi)(mi)度一致;使用(yong)藥膜正(zheng)字;用(yong)透射密(mi)(mi)度儀量度,白位密(mi)(mi)度為0.06以下;黑位密(mi)(mi)度為3.5以上。
3.曝光包括背曝光和主曝光。
背曝光。
感光(guang)(guang)樹脂(zhi)版的(de)(de)支(zhi)(zhi)撐膜向上、保護膜向下平鋪于曝(pu)光(guang)(guang)抽屜中(zhong)接受曝(pu)光(guang)(guang)。紫外光(guang)(guang)線透過支(zhi)(zhi)撐膜使(shi)感光(guang)(guang)粘接層固化.以建立穩固的(de)(de)底(di)基,也(ye)可控制(zhi)洗(xi)版深度(du),加(jia)強支(zhi)(zhi)撐膜與(yu)感光(guang)(guang)樹脂(zhi)層的(de)(de)結合(he)力。背曝(pu)光(guang)(guang)時(shi)間(jian)根(gen)據需要的(de)(de)底(di)基厚度(du)確定。
主曝光。
又稱正面曝(pu)(pu)光(guang)(guang),感(gan)(gan)光(guang)(guang)樹(shu)(shu)脂版(ban)材(cai)支撐膜(mo)(mo)朝(chao)下,保護(hu)膜(mo)(mo)朝(chao)上(shang)。平(ping)(ping)鋪(pu)在曝(pu)(pu)光(guang)(guang)抽屜中.將(jiang)保護(hu)膜(mo)(mo)連續一(yi)(yi)次撕(si)下,再將(jiang)菲(fei)林藥膜(mo)(mo)面貼在感(gan)(gan)光(guang)(guang)樹(shu)(shu)脂版(ban)材(cai)上(shang)面.把真空膜(mo)(mo)平(ping)(ping)女(nv)(nv)1始怎孽高產(chan)*女(nv)(nv)A 檢(jian)查方(fang)法(fa)蓋于菲(fei)林(非藥膜(mo)(mo)抽真空,使菲(fei)林與感(gan)(gan)光(guang)(guang)樹(shu)(shu)脂層貼合緊密。紫(zi)外線透(tou)過真空膜(mo)(mo)及菲(fei)林透(tou)光(guang)(guang)部(bu)分,使版(ban)材(cai)感(gan)(gan)光(guang)(guang)部(bu)分聚合固化(hua)。主曝(pu)(pu)光(guang)(guang)時間長短由版(ban)材(cai)型(xing)號和光(guang)(guang)源強弱確(que)定(ding)。曝(pu)(pu)光(guang)(guang)時間過短會(hui)使圖文坡度太直,線條(tiao)彎曲,小(xiao)(xiao)字(zi)、小(xiao)(xiao)點部(bu)分被洗掉,反之曝(pu)(pu)光(guang)(guang)時間過長會(hui)敷版(ban),字(zi)跡模糊。如果(guo)在同一(yi)(yi)張(zhang)印版(ban)上(shang)有大、小(xiao)(xiao)宇,粗、細(xi)線條(tiao).可視情況用黑膜(mo)(mo)遮蓋分別曝(pu)(pu)光(guang)(guang).細(xi)小(xiao)(xiao)部(bu)分就不會(hui)因沖(chong)洗丟失(shi),以(yi)確(que)保印版(ban)質量。
4.筆記本印刷沖洗。
將未感光部(bu)(bu)分洗(xi)刷溶(rong)解,保留光聚合的(de)浮雕。洗(xi)版(ban)(ban)(ban)時間(jian)長短根據印(yin)版(ban)(ban)(ban)厚(hou)薄和印(yin)紋深淺決定,洗(xi)版(ban)(ban)(ban)時間(jian)太短,版(ban)(ban)(ban)上會留下未感光的(de)樹脂而影響制版(ban)(ban)(ban)深度,洗(xi)版(ban)(ban)(ban)時間(jian)過長會使(shi)版(ban)(ban)(ban)材膨脹(zhang),導致精細(xi)部(bu)(bu)分變形(xing)或脫(tuo)落。
5.筆記本印刷烘干。
去除洗(xi)版(ban)(ban)溶劑,使(shi)印(yin)版(ban)(ban)恢復原來尺(chi)寸厚(hou)度。烘(hong)烤(kao)溫(wen)(wen)度在50—60℃之間(jian)(jian)(jian)。烘(hong)烤(kao)時間(jian)(jian)(jian)依版(ban)(ban)材(cai)厚(hou)薄(bo)和洗(xi)版(ban)(ban)時間(jian)(jian)(jian)的長(chang)短(duan)確定(ding),一般厚(hou)版(ban)(ban)兩小(xiao)時,薄(bo)版(ban)(ban)一小(xiao)時。烘(hong)烤(kao)時間(jian)(jian)(jian)過長(chang),烘(hong)版(ban)(ban)溫(wen)(wen)度過高將(jiang)會(hui)使(shi)印(yin)版(ban)(ban)變脆而(er)影響印(yin)刷壽命。烘(hong)烤(kao)溫(wen)(wen)度過低將(jiang)延長(chang)烘(hong)干時間(jian)(jian)(jian),烘(hong)烤(kao)時間(jian)(jian)(jian)過短(duan),印(yin)刷時會(hui)出現爛版(ban)(ban)現象。
6.筆記本印刷后處理。
即除粘(zhan)與后(hou)曝光。使感光樹脂徹底(di)硬化(聚合)達到應有(you)的硬度指標,并消除印版粘(zhan)性,以(yi)利于(yu)油墨傳(chuan)遞(di)。后(hou)處理時間(jian)由測試所(suo)得(de),目的在于(yu)不龜(gui)裂(lie)、不粘(zhan)著。