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1、印刷品紙張材質(zhì)及價格計算（Printingpapermaterialandpricecalculation）Therearemanykindsofprintedpaper,butthereareonlyseveralkindsofprintedbooksandnewspapers:Newsprint:whitepaper,ischaracterizedbysoftporous,institutionalstrength,agoodabsorbent,canmaketheinkpenetration.Inaveryshortperiodoftime,whe
2、nfoldingnotstickdirty,usedforprintingnewspapersinhighspeedweb,journalsandbooks.Thequantityofnewsprintis51grams/squaremeter,andthewidthofnewsprintis1572millimeters,1562millimeters,787millimetersand781millimeters.Thewidthofthepaperis787millimetersx1092mm,andthewidthofthepaperisfour
3、millimeters.Newsprintprintingadaptability,opaque,butwhitedegreeislow,surfacesmoothnessisdifferent,printingpicturesshouldusecoarsemesh,aftersunlighteasytoyellow,crisp,notlong-termpreservation.Coppersheetpaper:alsoknownascoatingpaper,iscoatedonthebaselayerofcalciumcarbonateorclayan
4、dotherbinderswithwhitepaintcoating,dryingaftercalenderingofadvancedprintingpaper.Becauseofthedelicatewhite,smoothnessandgloss,butalsohasmoderateoilabsorption,suitableforcopperplateprintingoroffsetprinting,printingcolorormonochromepictorial,pictures,calendars,mapsandbooks,andpacka
5、gingprintingpaper.Itcanbedividedintotwotypes:onesidecoatinganddoublesidecoating,andtheothertwoarespecial,No.1,No.2andNo.3,andthequantityis80grams/squaremeterto250grams/squaremeter.Copperplatepaperrequireshighercoatingstrength,offpowder,suitablefor60linespercmabovethefinemeshprint
6、ing.Offsetpaper:formerlyknownasthe"paper",isfortheuseofbooksandpaperprintingmachine.Suitableforprintingmonochromeormulticolorcoversofbooks,textandpictorial,inserts,maps,posters,colortrademarksandavarietyofpackagingproducts.Offsetprintingpaperisdividedintospecialnumber,No.1and2,qu
7、antitativefrom70grams/squaremeterto150grams/squaremeter.Thepulphashighstrengthandprintability.Offsetprintingisamoreadvancedbookprintingpaper,contrast,expansionrateandsurfacestrengthhavehigherrequirements,pHalsoshouldbeclosetoneutralorweaklyalkaline,soasnottoaffecttheprintingpaper
8、,quantityof40grams/squaremeterto80grams/
