Designation:D5663−15(Reapproved2020)StandardGuideforValidatingRecycledContentinPackagingPaperandPaperboard1ThisstandardisissuedunderthefixeddesignationD5663;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguideprovidesanapproachforboththecalculationandthesubstantiationofrecycledcontentoffinishedpackag-ingpaperandpaperboardproducts.Amassbalanceapproachisrecommendedforusebymanufacturerssincenophysicalorchemicaltestmethodiscurrentlyavailabletodetermineabsoluterecycledcontentofafinishedpaperproduct.Calcu-lationsarebasedontimeweightedaverageflowswhicharebasedonfurnishcomponentflowratesandconsistency.Rec-ommendedapproachestothecalculationsincludebybatchorbytimeweightedaverageforaspecificgradeorsimilargrades.Itisnotrecommendedthataveragerecyclecontentbeallocatedbymathematicalapportionmentratherthanbyactualfibercontent.Thatis,if50%recycledfiberisusedovertimethatisthetimeweightedaverage.Onecannotusethissamedatatoreport50%oftheproductionis100%recycled.1.1.1Percentagecalculationsarebasedonlb/tonorkg/tonnewiththetimeframeconstrainedbymachineandgrade(see10.1.1.1and10.1.1.2).1.1.2Pulpingandrecyclingyieldsarenotusedinthesecalculations.Thecalculationsofrecycledfibercontentinthefinishedproductissolelyafunctionoftypeoffibersinthefurnishflows,thevolumeofflowandthetimeperiodconsid-ered.1.2Thisguidecovers(1)recycledcontentofpackagingpaperandpaperboardproductsthatcontainanyamountorkindofrecycledfiber;and(2)methodstocalculateandsubstantiatethelevel(s)ofrecycledfibercontentclaimedbyanagreementbetweenthebuyerandtheseller.1.2.1Thisguidemaybeusedwithorwithoutmodificationtocalculateorsubstantiatetherecycledcontentofpackagingpaperandpaperboardproductswhenrecoverednonfibrousmaterials(forexample,filler)areapartoftherecycledfiberfurnish.Limitedguidanceisprovidedforappropriat...
