Designation:D6846−02(Reapproved2012)StandardPracticeforPreparingPrintsofPastePrintingInkswithaPrintingGage1ThisstandardisissuedunderthefixeddesignationD6846;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstheprocedureforpreparinglabo-ratoryprintsofpasteinksusingaprintinggageinconjunctionwithaflat-bedproofpress.1.2Thispracticeisapplicabletothepreparationofsolid-areaprintsbydirectletterpressorbydryoffsetonaflatsubstratesuchaspaper,paperboard,ormetal.1.3Thispracticeisapplicableprimarilytolithographicandletterpressinksthatdrybyoxidationorpenetration.Withtheadditionofappropriatedryingorcuringequipment,itisalsoapplicabletootherpasteinksystemssuchasheat-setorenergy-curable.1.4Theinstructionsinthispracticeareintendedtomini-mizethewithin-printandamong-operatorvariabilityinherentinhandoperations.1.5Thispracticefeaturesbuilt-ininkfilmthicknesscontrol.Itdoesnotmeasurethefilmthicknesstransferredtotheprint;however,filmthicknessequivalencemaybeevaluatedbyvisualorinstrumentalcomparisonsofopticaldensity.1.6ValuesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionsaregiveninSection7.2.ReferencedDocuments2.1ASTMStandards:2D1316TestMethodforFinenessofGrindofPrintingInksBytheNPIRIGrindometerD6073TestMethodforRelativeSettingofHeatsetPrintingInksD6487PracticeforPreparingPrintsofPastePrintingInksUsingaHandOperatedLaboratoryFlat-BedPress3.SummaryofPractice3.1Theprintinggageisinkedbyadrawdowntechnique;adoubledrawdownisrecommendedtominimizescratchesandimprove...
