CTP版(ban)的使用注意(yi)事項(xiang)

1.上機前的準備

印版(ban)上機前必須按(an)規范(fan)要求做好以(yi)下步驟。

      裝版(ban)(ban)(ban)夾或窩(wo)圓角：目前常用(yong)的(de)(de)裝版(ban)(ban)(ban)方式(shi)(shi)有(you)“掛鉤(gou)式(shi)(shi)”和(he)“插(cha)(cha)入式(shi)(shi)”兩種。對于(yu)采用(yong)掛鉤(gou)式(shi)(shi)裝版(ban)(ban)(ban)方式(shi)(shi)的(de)(de)印(yin)(yin)刷機(ji)(ji)，在(zai)印(yin)(yin)版(ban)(ban)(ban)上(shang)機(ji)(ji)以(yi)前需(xu)要在(zai)印(yin)(yin)版(ban)(ban)(ban)的(de)(de)叼口與拖梢處安裝版(ban)(ban)(ban)夾。安裝版(ban)(ban)(ban)夾時，應先(xian)將備用(yong)的(de)(de)版(ban)(ban)(ban)夾上(shang)的(de)(de)所(suo)有(you)螺釘(ding)松(song)開(kai)，然后將印(yin)(yin)版(ban)(ban)(ban)插(cha)(cha)入版(ban)(ban)(ban)夾之間(jian)(jian)(jian)，友迪(di)激光直接制(zhi)版(ban)(ban)(ban)機(ji)(ji)，后擰緊(jin)螺釘(ding)。裝版(ban)(ban)(ban)夾時需(xu)要注意以(yi)下(xia)事項(xiang)：①印(yin)(yin)版(ban)(ban)(ban)須(xu)裝在(zai)版(ban)(ban)(ban)夾的(de)(de)中(zhong)間(jian)(jian)(jian)部(bu)位，不可偏向(xiang)(xiang)一邊(bian)(bian)，以(yi)在(zai)印(yin)(yin)版(ban)(ban)(ban)上(shang)機(ji)(ji)后方便調(diao)整；②在(zai)擰緊(jin)版(ban)(ban)(ban)夾螺釘(ding)時，要從(cong)中(zhong)間(jian)(jian)(jian)開(kai)始向(xiang)(xiang)兩邊(bian)(bian)進(jin)行，切忌從(cong)兩邊(bian)(bian)向(xiang)(xiang)中(zhong)間(jian)(jian)(jian)進(jin)行，以(yi)防止印(yin)(yin)版(ban)(ban)(ban)中(zhong)間(jian)(jian)(jian)起包，影響印(yin)(yin)版(ban)(ban)(ban)的(de)(de)平整度；③印(yin)(yin)版(ban)(ban)(ban)必須(xu)頂(ding)緊(jin)版(ban)(ban)(ban)夾，以(yi)防止其在(zai)印(yin)(yin)刷中(zhong)因未夾緊(jin)而(er)脫落。

CTP制版(ban)機(ji)(ji)就是Computer to Plate的縮寫，屬于計(ji)算機(ji)(ji)直接制版(ban)印前設(she)備。早的CTP技(ji)術由柯達于1995年推出(chu)，Drupa 2000展覽(lan)會上，CTP技(ji)術有了一次(ci)飛躍，技(ji)術更加成熟，設(she)備開始真(zhen)正進入(ru)應(ying)用階段。

CTP制版特點

不(bu)足: CTP目前存(cun)在很多不(bu)足之處(chu)，如CTP系統(tong)費(fei)用比(bi)(bi)較高，激(ji)光(guang)直(zhi)接(jie)(jie)制版，且版材目前大部分(fen)需引進，CTP制版機(ji)，所(suo)以比(bi)(bi)較貴，中、小(xiao)型(xing)印刷(shua)公司不(bu)能接(jie)(jie)受。計算機(ji)直(zhi)接(jie)(jie)制版系統(tong)的數字化工藝流程(cheng)還不(bu)太成熟(shu)，特(te)別是數字打樣還不(bu)能完全模擬印刷(shua)。

CTP制版常見問題

  為什會出現斷(duan)板：

斷(duan)版(ban)(ban)(ban)主要出現在(zai)輪(lun)轉印(yin)(yin)(yin)(yin)刷(shua)(shua)機(ji)上，激光直(zhi)接制(zhi)版(ban)(ban)(ban)機(ji)，因(yin)為輪(lun)轉印(yin)(yin)(yin)(yin)刷(shua)(shua)機(ji)生產(chan)(chan)速(su)(su)度快(kuai)，要求印(yin)(yin)(yin)(yin)版(ban)(ban)(ban)包(bao)在(zai)滾筒方向的尺寸(cun)非(fei)常，印(yin)(yin)(yin)(yin)版(ban)(ban)(ban)紋路（Graining方向）要與(yu)版(ban)(ban)(ban)滾筒軸線垂直(zhi)。而單張紙印(yin)(yin)(yin)(yin)刷(shua)(shua)機(ji)由于生產(chan)(chan)速(su)(su)度較(jiao)慢，對印(yin)(yin)(yin)(yin)版(ban)(ban)(ban)紋路方向無(wu)要求。其他可能引(yin)起印(yin)(yin)(yin)(yin)版(ban)(ban)(ban)斷(duan)版(ban)(ban)(ban)的原因(yin)有：裝版(ban)(ban)(ban)有問題，彎版(ban)(ban)(ban)不方正(zheng)，版(ban)(ban)(ban)材尺寸(cun)有誤，包(bao)襯太短等。