###新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)光滑(hua)(hua)度(du)(du)(du)(du)(du)解析新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)作(zuo)為(wei)報刊(kan)印(yin)(yin)刷(shua)的(de)(de)(de)主要材料(liao)(liao)，其光滑(hua)(hua)度(du)(du)(du)(du)(du)是衡(heng)(heng)量紙(zhi)(zhi)(zhi)張(zhang)表(biao)面(mian)平(ping)整程度(du)(du)(du)(du)(du)的(de)(de)(de)重要指(zhi)(zhi)標(biao)(biao)(biao)，直接影(ying)響(xiang)油(you)(you)(you)墨(mo)(mo)附著性(xing)(xing)、印(yin)(yin)刷(shua)清晰度(du)(du)(du)(du)(du)及(ji)(ji)閱讀(du)體驗。以(yi)下從技(ji)(ji)術(shu)特(te)性(xing)(xing)、應(ying)用影(ying)響(xiang)及(ji)(ji)行(xing)業(ye)(ye)標(biao)(biao)(biao)準展開分析。####一、光滑(hua)(hua)度(du)(du)(du)(du)(du)的(de)(de)(de)技(ji)(ji)術(shu)定(ding)義光滑(hua)(hua)度(du)(du)(du)(du)(du)指(zhi)(zhi)紙(zhi)(zhi)(zhi)張(zhang)表(biao)面(mian)微(wei)觀凹凸結(jie)(jie)(jie)構的(de)(de)(de)均勻(yun)性(xing)(xing)，通(tong)(tong)(tong)常以(yi)貝克(ke)平(ping)滑(hua)(hua)度(du)(du)(du)(du)(du)（BekkSmoothness）或透氣度(du)(du)(du)(du)(du)指(zhi)(zhi)標(biao)(biao)(biao)衡(heng)(heng)量。新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)的(de)(de)(de)光滑(hua)(hua)度(du)(du)(du)(du)(du)范圍普(pu)遍在100-300秒(miao)(miao)(miao)(miao)(miao)（貝克(ke)法(fa)），低(di)(di)(di)于銅版(ban)紙(zhi)(zhi)(zhi)（600-1200秒(miao)(miao)(miao)(miao)(miao)），但需平(ping)衡(heng)(heng)吸墨(mo)(mo)性(xing)(xing)與印(yin)(yin)刷(shua)適(shi)(shi)性(xing)(xing)。####二、生(sheng)(sheng)產(chan)工藝的(de)(de)(de)影(ying)響(xiang)1.**漿(jiang)料(liao)(liao)配(pei)比(bi)**：機械木漿(jiang)占(zhan)比(bi)70%-85%提(ti)供(gong)蓬松(song)結(jie)(jie)(jie)構，化學漿(jiang)增強纖維(wei)結(jie)(jie)(jie)合(he)力(li)，高比(bi)例(li)短纖維(wei)可(ke)提(ti)升(sheng)表(biao)面(mian)致密性(xing)(xing)。2.**壓(ya)光工藝**：通(tong)(tong)(tong)過(guo)(guo)(guo)多輥壓(ya)光機進(jin)行(xing)機械壓(ya)光，壓(ya)力(li)控制(zhi)在30-50kN/m，可(ke)降(jiang)低(di)(di)(di)表(biao)面(mian)粗糙(cao)度(du)(du)(du)(du)(du)達15%-20%。3.**填料(liao)(liao)添加(jia)**：碳酸鈣、高嶺土(tu)等填料(liao)(liao)占(zhan)比(bi)8%-12%，可(ke)填補纖維(wei)間(jian)隙，使(shi)表(biao)面(mian)Ra值(zhi)（粗糙(cao)度(du)(du)(du)(du)(du)）降(jiang)至3-5μm。####三、印(yin)(yin)刷(shua)適(shi)(shi)配(pei)性(xing)(xing)表(biao)現(xian)-**油(you)(you)(you)墨(mo)(mo)轉移率(lv)**：光滑(hua)(hua)度(du)(du)(du)(du)(du)過(guo)(guo)(guo)低(di)(di)(di)（300秒(miao)(miao)(miao)(miao)(miao)）則影(ying)響(xiang)干燥(zao)速(su)(su)度(du)(du)(du)(du)(du)，卷(juan)(juan)筒新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)價格(ge)，增加(jia)蹭臟風(feng)險。-**網點再(zai)現(xian)性(xing)(xing)**：60線(xian)/英寸印(yin)(yin)刷(shua)時，光滑(hua)(hua)度(du)(du)(du)(du)(du)200秒(miao)(miao)(miao)(miao)(miao)的(de)(de)(de)新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)可(ke)保(bao)持85%以(yi)上的(de)(de)(de)網點還原率(lv)，確保(bao)圖片(pian)層次感。-**輪(lun)轉印(yin)(yin)刷(shua)速(su)(su)度(du)(du)(du)(du)(du)**：現(xian)代高速(su)(su)輪(lun)轉機（15m/s）要求紙(zhi)(zhi)(zhi)張(zhang)表(biao)面(mian)摩擦系(xi)數≤0.35，B級卷(juan)(juan)筒新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)，需通(tong)(tong)(tong)過(guo)(guo)(guo)表(biao)面(mian)施(shi)膠(jiao)控制(zhi)靜電產(chan)生(sheng)(sheng)。####四、行(xing)業(ye)(ye)標(biao)(biao)(biao)準與測試ISO8791-4規定(ding)使(shi)用本特(te)生(sheng)(sheng)粗糙(cao)度(du)(du)(du)(du)(du)儀測試，新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)典型(xing)值(zhi)為(wei)200-400ml/min（氣流法(fa)）。北(bei)美TAPPIT555標(biao)(biao)(biao)準要求4kg/cm2壓(ya)力(li)下平(ping)滑(hua)(hua)度(du)(du)(du)(du)(du)≥90秒(miao)(miao)(miao)(miao)(miao)。實(shi)際生(sheng)(sheng)產(chan)中，報業(ye)(ye)集(ji)團多執(zhi)行(xing)±10%的(de)(de)(de)允差標(biao)(biao)(biao)準，卷(juan)(juan)筒新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)批發，確保(bao)跨批次穩定(ding)性(xing)(xing)。####五、環(huan)保(bao)趨勢下的(de)(de)(de)演進(jin)隨(sui)著再(zai)生(sheng)(sheng)纖維(wei)使(shi)用比(bi)例(li)提(ti)升(sheng)至60%-80%，新(xin)(xin)型(xing)表(biao)面(mian)處理(li)劑（如納米(mi)(mi)纖維(wei)素）可(ke)將再(zai)生(sheng)(sheng)新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)光滑(hua)(hua)度(du)(du)(du)(du)(du)提(ti)升(sheng)20%，同(tong)(tong)(tong)時維(wei)持45g/m2的(de)(de)(de)低(di)(di)(di)定(ding)量要求。數字印(yin)(yin)刷(shua)適(shi)(shi)配(pei)型(xing)新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)通(tong)(tong)(tong)過(guo)(guo)(guo)涂布0.5-1.0g/m2的(de)(de)(de)納米(mi)(mi)涂層，可(ke)在保(bao)持環(huan)保(bao)性(xing)(xing)的(de)(de)(de)同(tong)(tong)(tong)時將光滑(hua)(hua)度(du)(du)(du)(du)(du)優化至250-400秒(miao)(miao)(miao)(miao)(miao)區(qu)間(jian)。結(jie)(jie)(jie)語(yu)：新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)光滑(hua)(hua)度(du)(du)(du)(du)(du)的(de)(de)(de)控制(zhi)需在印(yin)(yin)刷(shua)適(shi)(shi)性(xing)(xing)、成本控制(zhi)及(ji)(ji)環(huan)保(bao)要求間(jian)取得平(ping)衡(heng)(heng)。隨(sui)著冷固型(xing)油(you)(you)(you)墨(mo)(mo)技(ji)(ji)術(shu)進(jin)步(bu)及(ji)(ji)CTP制(zhi)版(ban)精度(du)(du)(du)(du)(du)提(ti)升(sheng)，現(xian)代新(xin)(xin)聞(wen)紙(zhi)(zhi)(zhi)正朝著'適(shi)(shi)度(du)(du)(du)(du)(du)光滑(hua)(hua)+快速(su)(su)固著'方向(xiang)發展，在保(bao)證(zheng)閱讀(du)品質(zhi)的(de)(de)(de)同(tong)(tong)(tong)時適(shi)(shi)應(ying)綠色(se)印(yin)(yin)刷(shua)趨勢。

新聞紙的如下：定量（gm/m2）：51—60；伸縮率(%):-4～+7)；白度:89％(或以上);水溶性墨粉黑含量:

新(xin)聞(wen)紙(zhi)(zhi)的(de)(de)(de)(de)(de)印刷(shua)(shua)平(ping)(ping)滑(hua)度(du)(du)是(shi)反映其(qi)表(biao)面(mian)平(ping)(ping)整(zheng)、光(guang)滑(hua)程度(du)(du)以(yi)及(ji)(ji)油(you)墨(mo)與(yu)紙(zhi)(zhi)張接觸緊密程度(du)(du)的(de)(de)(de)(de)(de)性(xing)能(neng)指標(biao)。由(you)于新(xin)聞(wen)紙(zhi)(zhi)主(zhu)要用(yong)(yong)(yong)于報紙(zhi)(zhi)等出版(ban)物的(de)(de)(de)(de)(de)印刷(shua)(shua)，因此對其(qi)平(ping)(ping)滑(hua)度(du)(du)的(de)(de)(de)(de)(de)要求(qiu)(qiu)具(ju)有(you)一(yi)定(ding)的(de)(de)(de)(de)(de)特(te)殊性(xing)。一(yi)般來說，相(xiang)較(jiao)于銅版(ban)紙(zhi)(zhi)和(he)(he)膠版(ban)紙(zhi)(zhi)等高涂料紙(zhi)(zhi)而(er)(er)言(yan)，新(xin)聞(wen)的(de)(de)(de)(de)(de)紙(zhi)(zhi)質(zhi)較(jiao)為(wei)粗糙(cao)且未(wei)經過壓(ya)(ya)光(guang)處理或僅微施膠的(de)(de)(de)(de)(de)表(biao)面(mian)使(shi)其(qi)具(ju)有(you)較(jiao)低的(de)(de)(de)(de)(de)初始平(ping)(ping)滑(hua)度(du)(du)和(he)(he)較(jiao)高的(de)(de)(de)(de)(de)孔隙(xi)率；但(dan)這也(ye)賦(fu)予(yu)了它較(jiao)強的(de)(de)(de)(de)(de)吸(xi)墨(mo)性(xing)和(he)(he)良好的(de)(de)(de)(de)(de)可壓(ya)(ya)縮(suo)性(xing)——在適當的(de)(de)(de)(de)(de)壓(ya)(ya)力下可以(yi)填補表(biao)面(mian)的(de)(de)(de)(de)(de)不(bu)平(ping)(ping)整(zheng)處并(bing)與(yu)油(you)墨(mo)形成(cheng)均勻的(de)(de)(de)(de)(de)接觸面(mian)，從而(er)(er)在一(yi)定(ding)程度(du)(du)上提(ti)高了實際(ji)的(de)(de)(de)(de)(de)“印刷(shua)(shua)”平(ping)(ping)坦效果（盡管仍不(bu)及(ji)(ji)高涂料的(de)(de)(de)(de)(de)精細(xi)用(yong)(yong)(yong)紙(zhi)(zhi)）。為(wei)了獲得更好的(de)(de)(de)(de)(de)網點還(huan)原(yuan)效果和(he)(he)色彩鮮艷度(du)(du)并(bing)減少脫粉掉毛(mao)現象的(de)(de)(de)(de)(de)發(fa)生概(gai)率，彩報制(zhi)作時(shi)往往需選用(yong)(yong)(yong)具(ju)有(you)一(yi)定(ding)水平(ping)(ping)而(er)(er)又不(bu)至于過高導致(zhi)影響(xiang)正常(chang)著油(you)的(de)(de)(de)(de)(de)新(xin)聞(wen)品(pin)(pin)種。實際(ji)操作中(zhong)常(chang)采用(yong)(yong)(yong)100﹨~120線左右的(de)(de)(de)(de)(de)網線進行(xing)加網以(yi)適應這類材質(zhi)特(te)性(xing)；同時(shi)需注意控制(zhi)相(xiang)關工(gong)藝參數如潤濕液用(yong)(yong)(yong)量、油(you)料黏度(du)(du)及(ji)(ji)機械張力等來維持(chi)套準精度(du)(du)和(he)(he)產品(pin)(pin)品(pin)(pin)質(zhi)穩定(ding)輸出。此外對于雙面(mian)印制(zhi)需求(qiu)(qiu)還(huan)必須嚴格限制(zhi)兩面(mian)間差(cha)異以(yi)確(que)保(bao)終(zhong)成(cheng)品(pin)(pin)質(zhi)量達標(biao)不(bu)出現透底等問題發(fa)生概(gai)率為(wei)零或是(shi)小化(hua)狀態呈現給用(yong)(yong)(yong)戶端視(shi)野之(zhi)中(zhong)去考(kao)量執行(xing)方案制(zhi)定(ding)工(gong)作展開實施步驟安(an)排到(dao)位落實到(dao)底才是(shi)關鍵所在之(zhi)處也(ye)！