Laminated glass is a safety glass made by
laminating two or more sheets of equal or
unequal glass thicknesses with a flexible plastic
interlayer (called PVB – poly vinyl butyral).
The glass and interlayer are bonded together by
heat and pressure in an autoclave. Generally
this interlayer is 0.38mm thick for annealed
glass but other thicknesses are available.
05laminated safety glass
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laminated glass
features and applications
0 Safety–GradeAsafetyglasswhichmeetsAS1288requirements.Dependingontheseverityofimpact,willnotsplinterintojaggeddangerouspiecesandwillremainintactinopening;
0 Colour range–WiderangeofcoloursandPVBthicknessesincluding0.38,0.76,1.14,and1.52mm;
0 Stronger–Heatstrengthenedandtoughenedlaminatedglassenablinglargerpanelstobeglazedwithgreaterresistancetowindloadingoverordinaryannealedglass;
0 Climate control–Solarandthermalcontrolfunctionsthroughuseoftinted,reflective,low-Eglassgivingusermanyperformanceoptions;
0 Security–Securityfeatureswhichgreatlyaidpreventionofillegalentryand/orvandalism(eg.,1.52mmPVBandSentryGlas®Plusinterlayers);
0 Storm protection (weather/disastercontrolfeatures)–Dependingonseverityofimpact,glassstaysintactintheopeningwhenbrokenthuspreventingdamagingeffectsofweatherinsidebuildingunlikeordinaryannealedglass;
0 UV protection–Helpstoprotectcarpets,curtains,andfurniturebyscreeningout99%ofallultra-violetlight;
0 Fire protection(fireretardation)–Laminatedglassthoughnotusedonitsownaspartofafireresistantglazing,stillprovideslongerevacuationtimewhencomparedtoordinarythinannealedglass;
0 Noise reduction–Noisereductionbenefits;
FormoredetailsreferSection16.
0 Distortion free–visuallydistortionfreeinannealedform;
0 Applications–suitedforoverheadglazingsuchaswindowsdirectlyabovedoorways,rooflites,skylitesandmultistoreybuildings,whereuponimpactglassisunlikelytofalltothegroundbelow.Alsosuitedfordoors,internalpartitions,sidelites,liftwells,balustrading,laminatedmirrorsinwalkthroughrobesituations,wetareasandotherareasasrequiredbyAustralianStandards.
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glass performance diagram definitions
0 SHGC=Solarheatgainco-efficient;
0 U-value=Thermalinsulationpropertiesexpressedinwattsxm2perdegreeCelsius;
0 VLT=%Visiblelighttransmittance;
0 VLR=%Visiblelightreflectance.
diagram 5.1: typical laminated glass make-up
design and glazing notes
0 Interlayers: PVB’s–Standardstockedlaminatedglassusesthesamethicknessandcolourinterlayer(generally0.38mmthick).Onlyslightcolourvariationwilloccurastheoverallglassthicknessincreases;
0 Heat strengthened/toughened: PVB’s–Heatstrengthened/toughenedlaminatedglasswillgenerallyrequireathickerPVBinterlayerthanthestandard0.38mmthickness.Theprocessoftemperingglasscreatessomedistortionandrollerwaves.Theglassisgenerallynotasflatasordinaryannealedglass.Thereforeathickerinterlayerisutilisedtoadequatelybondtheglassandinterlayer;
0 Glass panel edges–Laminatedglassmusthave‘good’straightcleancutedgeswithminimaldefects.Allreflectivelaminated,vacuumcoatedlaminatedglassandpyrolyticlow-ElaminatedmadeupwithtintedPVB’sorbodytintedlitesshouldhaveflatgroundedgesonallsidesasaminimum;
0 Matching–Colouredinterlayersdonotcloselymatchtintedfloats.Thismaycauseaproblemwherefloatandsafetyglassarerequiredinthesameglazingsituation.Solutionsmayincludeusingalllaminatedglassorlaminatingthetintedfloat;
0 Thermal breakage–Tinted,reflectiveandlow-Ecoatedlaminatedglassshouldhaveathermalassessmentcarriedouttodetermineriskofthermalbreakage.Tougheningorheatstrengtheningwillpreventthermalbreakage;
0 Distortion and reflection–Duetothecontrollednatureofthelaminatingprocess,facadesglazedwithlaminatedannealedglassavoidtheriskofvisibledistortions,providingsignificantlysharperreflections.Thesebenefitsaredependentonthenatureofthefinalprocessedproduct;
0 Edge delamination/blushing–Generallyspeaking,somedegreeofedgedelaminationoredgeblushisinherentinmostPVBlaminatedglassproducts.Edgedelaminationisusuallytheresultofthebreakdownofthebondbetweentheglassandtheinterlayerbyatmosphericmoistureattack,orsealantdegradation.Certainconditionswillaccelerateorretardthemanifestationofedgedelamination,butasaruleedgedelaminationshouldnotextendmorethan6mmforordinaryannealedlaminatedandnomorethan10mmforheatstrengthenedortoughenedlaminatedglass.Thisextentofdelaminationdoesnoteffectthestructuralintegrityoftheglass.Asitismostnoticeablewhenlaminatedglassisinstalledwithanexposededge,ifdiscolourationandedgedelaminationisaconcern,itisrecommendedthattheedgesbefullyglazedinaframeoraSentryGlas®Plusinterlayerbeused.Inglazingapplicationssuchasframelessbalustrading,astainlesssteeltrimorchannelmaybefixedtotheedgestocoveranydelamination.Careshouldbetakenthatthesetrimsdonotcapturewaterandthatthefixingsealantusediscompatible.
Seepage38formoreinformation.
0 Silicone, sealants and putty use–Theedgesoflaminatedglassshouldnotbeexposedtowater,linseedoilputtiesoracidcuresilicones.
ordering guidelines
Laminated glassallowsconstructionofmanydifferenttypesofglass,processesandthicknessestosuittheuserandapplication.Thefollowingsectionisaguidetoconstructinglaminatedglassbasedonglassproducttypeused.
Before ordering, please refer to the following information:
0 Interlayersandthicknesses;
0 Sizes;
0 Clearfloatwithclear/tintedPVBlaminated;
0 Tintedfloatlaminated;
0 Reflectivecoatedlaminated;
0 Low-Ecoatedlaminated;
0 Sunergy®Laminated;
0 XIRLaminatedFilmproducts;
0 Security–BasicAttackResistance;
0 SentryGlas®Plus(SGP)Highstrengthlaminated;
0 TranslucentPVBlaminated;
0 Patternlaminated;
0 Vanceva™Decorativelaminated;
0 Toughenedlaminated;
0 Heatstrengthenedlaminated;
0 Combinationheatstrengthened/toughenedlaminated;
0 Automotivelaminated.
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interlayers and thicknesses
architectural
0 ThefollowingPVBinterlayersareavailabletobelaminatedwithmosttypesofglass:
ClearGreyBronzeGreenCoolblueTranslucentSoftwhitetranslucent;
ForstandardproducttypesstockedatNationalGlass,pleasereferSection21.
0 TypicalPVBinterlayerthicknessesavailableforglassmake-up:
0.38mm(standardforannealedglass)0.76mm1.14mm1.52mm;
0 Typicalfinishedglassmake-upthicknessesusing2litesofequalthickness:
5.38mm/6.38mm/8.38mm/10.38mm/12.38mm5.76mm/6.76mm/8.76mm/10.76mm/12.76mm6.52mm/11.52mm;
0 Somelaminatesmayalsohaveunevenlitethicknesses;
0 Heatstrengthenedandtoughenedlaminatedglasswillgenerallyhaveminimumsof0.76mmto1.52mmthickinterlayersrespectively.
sizes
maximum
0 Thelargestavailableannealedlaminatedglasssizeisrestrictedbyautoclavesize,substrateorbaseproductsizeandtype.ThelargestsizeabletobemanufacturedinAustraliais5100mmx3210mm.Largerpanelsareavailableonextendedleadtimes;
PleasereferSection21formoresizingdetails.
0 Heatstrengthenedlaminatedandtoughenedlaminatedglassisrestrictedbytougheningfurnacespecificationsandbedsize.
minimum
0 Thesmallestpanelofglassthatcanbecutfromoriginalsizesheetsis100mmx100mm;
0 TheminimumsizeforpanelswithFlatGround/Polish(straightedges)willbe250mmx100mm;
0 Heatstrengthenedandtoughenedlaminatedglasssizesmustequal260mminthediagonalmeasurement.
Seepage30.
clear float glass with clear/tinted PVB’s
Thisisthestandardstockedlaminatedproductusing2litesofclearglasswithaclearortintedPVBinterlayer.Availableasfinishedcut-to-sizeitemorsoldinoriginalsheetformforendusertocut-to-size.
SeeSection21forstocksizedetails.
tinted float glass laminated
Notgenerallyareadystockeditem,butismanufacturedasafinishedcut-to-size.Mostoftentheuserwishestoutilisethebenefitsoflaminatedglasswhilststillretainingtheperformanceorcolourofabodytintedglass.
TintedfloatglasslaminatedisusuallymadeupwithaclearPVB(thoughatintedPVBmaybeaddedtofurtherenhancesolarperformanceorcolour).Thetintedfloatislaminatedastheoutsideliteprovidingoptimalsolarcontrol.Thisisalsorelevantwherepanelsarerakedoroutofsquaretoavoidcolourdiscrepancieswithadjacentpanels.
reflective coated glass laminated
pyrolytic reflective glass – hard coat
Acoatedreflectiveglasssurfaceisnowintroducedtothelaminatedglassmake-up.Thereflectiveglassisgenerallyglazedastheoutsidelitewiththereflectivecoatingitselfonsurfaceposition#2.Thiswillonlymarginallydecreaseperformanceintermsofheatcontrol.Reflectivesurfaceplacementon#1shouldbeavoidedduetoeffectsofweatheringandpollutantsandsubsequentcleaningdifficulties.
SeeDiagram5.1.
vacuum coated reflective glass – soft coat
Acoatedreflectivesurfaceisnowintroducedtothelaminatedglassmake-up.Subjecttofewexceptions,tintedPVBinterlayeredlaminatedglasshasthereflectivecoatingonsurfaceposition#3.TheeffectofthetintedPVBistodampenthereflectivitywherebuildingcodesareconcerned.Surfaceposition#3willalsoenhancethecolouroftheinterlayerreducingthemirrorlikeappearance.
SeeDiagram5.1forsurfacepositions.
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6.38mmgreenPVBlaminated–BradnamsCommercial.
21.52mm toughened laminated with ceramic painted pattern – Bradnams Commercial.
low-E coated glass laminated
pyrolytic low-E glass – hard coat
AddingaSungate®500orSunergy®low-Ecoatedglasstoamonolithiclaminatedglassmake-upprovidestheoptionofeithersurfaceposition#2,#3or#4glazing.However,bestuseisintendedwithsurface#4placement(seeDiagram5.1).Thisallowsforlower“U”valuesorimprovedinsulationproperties.Surfaceposition#2or#3placement,thoughprovidingsomebenefitsthroughlowerSHGC,providesthesame“U”valueperformanceasordinarynoncoatedglass.Placementofcoatingwillalsobegovernedbyenergyefficiencybuildinglegislationwhichstipulatesacertainlevelofinsulationwhichcanbeachievedthroughsurfaceposition#4placement.Low-Ecoatingplacementonsurfaceposition#1shouldbeavoidedduetoeffectsofweatheringandpollutantsandsubsequentcleaningdifficulties.
Formoreinformationreferpage19.Seealso“VisualCharacteristics–Low-ECoatedGlass”page21.
vacuum coated low-E glass – soft coat
Currenttechnologyonlyallowsforvacuumcoatedlow-Eplacementonsurfaceposition#2and#3inmonolithicapplications.LowerU-valuebenefitscanonlybeachievedwithIGU’s.
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sunergy® laminated
Sunergy®glassisapyrolyticlow-Ecoatedtintedglasswhichcombinesimprovedsolarcontrol(SHGC)andthermalinsulation(U-value).Itisalsoanexcellentresponsetocurrentarchitecturaltrendsdesiringneutrality,lowreflectionandhigherlevelsofvisiblelighttransmittance.
Sunergy®isavailableinthefollowingbasethicknessesforlamination:
0 3/4/6/8/10mmSunergy®Neutral;
0 6mmSunergy®Green;
0 6mmSunergy®Azur.
emissivity
Surface emissivity =0.28
single glazing
Sunergy®’sdurablepyrolyticcoatingmakesitpossibletouseSunergy®insingleglazing.Inthiscaseitisthesolarcontrolpropertiesthatarethemostimportantfunction.Maximumperformanceisachievedwiththecoatingonsurfaceposition#4forlaminatedglass.Surfaceposition#1shouldbeavoided.TheU-valueorthethermalinsulationfactorisalsoimprovedbyupto30%overordinarynon-coatedglazing.
Sunergy®Green,Azurandlaminatedmake-upsusingtintedPVB’sofferahigherenergyabsorptionthanSunergy®Neutralandordinaryclearfloatglass.Toavoidbreakageasaresultofthermalstress,werecommendthatathermalstressassessmentbecompleted.
FormoreinformationonSunergy®includingcleaningandhandlingtopics,referpages20and26.
Foracomprehensiverangeofperformancedatareferpage142.
Performance 6.38mm Sunergy® Neutral:
Madeupof:1@3mmclear/[email protected]/1@3mmSunergy®Neutral#4.
All photos: 6.38mm Sunergy Grey PVB laminated – AQF Windows and Doors.
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Performance 6.38mm Sunergy® Grey PVB:
Madeupof:1@3mmclear/[email protected]/1@3mmSunergy®Neutral#4.
Performance 6.38mm Sunergy® Green PVB:
Madeupof:1@3mmclear/[email protected]/1@3mmSunergy®Neutral#4.Thismake-upusesagreenPVBinterlayerratherthanthe6mmSunergy®Green.
visual characteristics – low-E glass
Sungate®500,Sunergy®andotherlow-Ecoatedproductsincertainlightingconditionsmaydisplayslightvisualdistinctionswhencomparedtoordinarynoncoatedglass.Thisisaninherentcharacteristicofthelow-Ecoatingandindicatesthefunctionalpropertiesoftheglass.Werecommendsamplesbeviewedunderbothnaturalandartificiallightingconditionsforproductacceptance.
XIR laminated film
Formaximumdaylightingwithminimumsolarheatgain,laminatedglassincorporatinghighperformancecolourneutralXIRfilmsarenowavailable.Thefilmitselfislaminatedbetweenthetwosheetsofglassforprotection.XIRfilmsareidealforlargefacades,sportingfacilities,atriums,libraries,skylightsandmuseumswheresolarcontroliscriticalwithoutthesacrificeofnaturaldaylight.SolarenergyperformancecanbefurtherimprovedbycombiningXIRfilmswithtintedPVB’s,tintedfloats,reflectiveandlow-Ecoatedglassproducts.
Performance XIR 12.76mm Energy Advantage (#4):
Performance XIR 12.76mm Sunergy® Neutral (#4):
security – basic attack resistance
Laminatedglassisavailableusinga1.52mminterlayertomakea6.52mmand11.52mmlaminatedglass.Theseproductsareidealforsituationswherethenoisegeneratedbytheattackalertsneighboursoroccupants.Thethickerinterlayerisdesignedtosignificantlyincreasetheamountoftimeandeffortrequiredbytheintrudertogainaccessthroughtheglazing.Thisservestodissuadeandthwartwouldbeintrudersorburglars.
Seealso“Security”,Section18.
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sentryglas® plus SGP
DuPont SentryGlas® Plus (SGP) interlayeristhelatestinalonglineofproductsofferedbyDuPontforuseinlaminatedsafetyglass.Inresponsetoarchitecturalandtransportationindustrydemandsfortougherwindowsystemswithglassonboththeinnerandoutersurfaces,DuPonthasintroducedSGPionoplastinterlayer.Inproperlydesignedwindowsystems,thistechnologyhaspasseddemandinghurricaneprotectioncodesinSouthernFlorida.Italsooffersimprovedballisticprotectionorthinnerconstructionsthanarenowpossiblewithconventionallaminatedglass.SGPoffersfivetimesthetearstrengthand100timestherigidityofconventionalPVBlaminatedglassinterlayer.
features and applications
SGP laminatesofferextendedfunctionalityversuslaminateswithtraditionalinterlayersandmakesthemverysuitablefortheapplicationswherethefollowingfeaturesarerequired:
0 Strongerlaminates,particularlywhenbendingstressstateisdominant–
In2-sided/1-sidedsupportconditions Inpoint-supportconfigurations Inhighaspectratio(>1.5)plateswith4-sidesupport;
0 Lowerdeflection;
0 Hightearstrength;
0 Highstiffness;
0 Lowcreep;
0 Impactandstructuralperformanceoverawidetemperaturerange;
0 Superiorpost-glassbreakageproperties;
0 ImprovededgestabilityoverstandardPVB’s;
0 HighClarity;
0 Lowopticaldistortion(insomecasesSGPcaneliminatetheneedtousetoughenedorheatstrengthenedglass).
interlayers and thicknesses
Availableinclearonly1.52mmand2.28mmionoplastinterlayerthicknesses.Forcolours,abodytintedglassmustbeincorporatedinthemake-up.SGPcannotbelaminatedwithconventionalPVBinterlayer.
sizes
0 Maximum SGP interlayer size–3000mmx1800mm.
edge stability and delamination
SGPlaminatesaredisplayingexcellentweatheringperformance.Aftermorethan7yearsofnaturalweatheringinFlorida,USAnodefectswereobservedinthelaminatedglasssamplesandalongtheedges.Testswithneutralcurestructuralsiliconesealantshavealsorevealedexcellentperformance.Thisprovidestheopportunitytouseexposededgelaminatedglasswithlessconcernofedgedelamination.
All photos: 30.56mm Cyclone resistant laminated – Make-up 10mm Azuria toughened/2.28mm SGP/10mm clear toughened/2.28mm SGP/6mm Energy Advantage low-E (#4) toughened. Fletcher Construction American Samoa. Glazed by National Glass. Architect – Lively Architects.
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White translucent laminated – Rapid Glass.
Topandmiddlephoto:6.38mmwhitetranslucentlaminated–BradnamsCommercial.
translucent PVB laminated
Translucentandsoft white translucent0.38mmPVBinterlayerswithclearglassareusedtomake-upthisproduct.Whereacolouredtranslucentisrequired,atintedPVBinterlayerisgenerallyadded.Thiswillincreasetheinterlayerthicknesstoaminimumof0.76mm.Availableinsizesupto2760mmx3660mm.
pattern laminated glass
Typically,apatternedortexturedglassislaminatedwithaclearglass.Becauseofthepatternedglasscontours,a0.76mmthickPVBisrequiredforsuccessfullamination.PatternswithdeepercontoursorprofilescannotbelaminatedwithstandardPVB’s.Inthiscaseanalternativeformofmanufacturingisavailable.Called‘liquidpour’or‘castinplace’,thismethodinvolvespouringaresinintothecavitybetweentwosheetsofglass.
TheresincurestoproduceaGradeAsafetyglass.LiquidpourorCIP(castinplace)ismanufacturedwitha6mmor4mmwhitebutylstriptapearoundtheperimeterwhichmustberemovedifedgesareexposed.Pleasespecifyrebatedetails.Removaloftapeinvolvesgrindingorcuttingatextracost.TheliquidpourmethodisusedonpatternedglasswithdeepprofilessuchasKosciusko,Broadline,Narrowreed,Flemish,ArticoandMonumentals.
Seepage45formoredetails.
Resinthicknessesare0.80mmand1.60mmthick.Coloursaregenerallyrestrictedtolaminatingabodytintedglass/clearresin/clearglassasresincolourswillfadeifglazedexternally.ClearresinisUVresistant.Maximumsizesupto2600mmx1400mm.
ReferSection21forastocklistofstandardpatternedPVBlaminatedglassandsizes.
available colours
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vanceva™ decorative laminated
Vanceva™bySolutia,isaninterlayersystemthatincorporatescolourandgraphicstocreateauniquerangeoflaminatedglass.TheVanceva™interlayerisapermanentlybondedadvancedlaminatedglasssolutionthatiseasilymaintained.
Vanceva™’scolouredinterlayersenableslaminatedglasstobeproducedinawidechoiceofcoloursotherthanthestandardgrey,bronze,greenandbluePVBinterlayers.Thesecolourscanalsobecombinedwithabroadrangeofpatterns.
FormoreinformationoncolourdesignoptionsvisittheProductStudioatwww.vanceva.com.
sizing
0 Maximum size–3660mmx2440mm;
0 Minimum size–100mmx100mm.
All photos: Vanceva laminated – photos courtesy of DMS Glass.
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toughened laminated
Thistypeoflaminatedglassconsistsoftwolitesormoreoftoughened glass.Tougheningisrequiredwherethereisariskoftheglassbreakingduetoheatstressorhighloading(i.e.windloading).A1.52mmthickinterlayerisgenerallyaminimumrequirement.
ToughenedlaminatedglassisaGradeASafetyGlass.
Acharacteristicoftoughenedlaminatedglasswhenbrokenisthattheglassfragmentsintosmallpieceswhichmaycausetheglasstosagunderitsownweightandfalloutoftheopening(overheadglazing,structuralbalustradeswithnohandrail).Maximumandminimumsizesaregenerallyrestrictedbytougheningfurnacespecificationsandlaminateautoclavesize.
Seepage30.
EdgeworkandprocessingguidelinesarethesameasHeatStrengthenedlaminatedglass.
heat strengthened H/S laminated
Thistypeoflaminatedglassconsistsoftwolitesormoreofheat strengthened glass.Heatstrengtheningisrequiredwherethereisariskoftheglassbreakingduetoheatstressorhighloading(i.e.windloading).A0.76mmthickinterlayerisgenerallyaminimumrequirementwithH/Slaminatedglass.H/Slaminatedisalsopreferredovertoughenedlaminatedbecausethereislessvisualdistortion.Thisisespeciallyimportantinreflectiveglazings.
H/SlaminatedglassisaGradeASafetyGlass.
AcharacteristicofH/Slaminatedglasswhenbrokenisthattheglasswillbreakintolargerpieces.Thisisusefulforoverheadglazingwheretheglassisthenlesslikelytosagandfalloutoftheopening.HoweverinthesesituationstheframingsystemshouldallowforadequatecaptureorcovertoensurethatwhenbothlitesoftheH/Slaminatedarebroken,theglassdoesnotfallout.
Seealso“PointFixedOverheadGlazing”onpage101.
Maximumandminimumsizesaregenerallyrestrictedbytougheningfurnacespecificationsandlaminateautoclavesize.
Seepage30.
EdgeworkandprocessingshallbereferredtoSection12.
Processingsuchasholesandtheirpositionsarebasedontheindividualthicknessofeachliteofglass.A12.76mmglassmadeupof2@6mmpanelsshallhaveholepositionsrelatedtoa6mmpanelofglass.
combination heat strengthened/toughened laminated glass
H/Sandtoughenedglasscanbelaminatedtogetherforspecificsituations.
automotive
NationalGlasshasanautomotivepostcuttinglicencetoservicetheneedsoftheflatglassautomotiveindustry.Automotivelaminatedglassisavailablein5.76–6.76mmWHP(windscreenhighperformance)clearandgreen.Otherautomotivelaminatedglassincludes5.38–6.38mmclear,grey,green,bronzeandmediumbrown28%.
SpecialrequirementssuchasgreaterthicknessesandothercoloursareavailableonaP.O.A.basis.
the difference between architectural and automotive
Themanufacturingprocessforbothtypesoflaminateareidentical,exceptatthetestingstage,whereautomotivelaminatedglassrequiresadditionaltestingasperAS/NZS2080.Alllaminatedglassinoriginalsheetformshouldhaveacompliance‘sticker’stamp.SomelaminatedglassisdualstampedsothatitcanbeusedforeitherArchitecturalorAutomotivepurposes.WHPlaminatedautomotiveglassisthepreferredglazingmaterialforvehiclewindscreensasitisrequiredtopasstwoadditionaltests:
1 Secondary image;
2 Distortion of vision.
ThismakesitsuitableforPrimaryvisionareause(i.e.thatpartofthewindscreenwhichgivesthedrivertheirfieldofvision).
WHPPVBinterlayerhasbeenspecificallydesignedforhumanimpactconditionsandundernocircumstancescanordinarylaminatedglassorarchitectural0.76mmlaminatedglassbeusedinwindscreenapplications.Theminimumrequirementforstandardwindscreensincarsorbusesis5.76mmor6.76mmthickWHPlaminatedsafetyglass.
automotive special note
InorderforautomotiveglasstodemonstratecompliancewithAustralianStandardAS/NZS2080Safetyglassforlandvehicles,eachpieceofglassfittedtoavehiclemustbeindeliblyanddistinctlymarkedwiththe:
0 Manufacturersnameortrademark;
0 Identificationofthestandard(AS/NZS2080);and
0 Typeofautomotiveglass(T,CHT,L,LT,LCHT,HP,WHP).
WhenforexampleNationalGlasspurchasesandre-cutsWHPorHPPVBautomotivelaminatedglass,theoriginalglasssheetcontainsastickerwithauniqueserialnumberedlabel.ThisnumberisrecordedbyNationalGlassandoffcutsfromtheoriginalsheetofglassarere-identifiedbytheserialnumberfromthe‘MotherSheet’fortotaltraceabilityofallcutglassfromtheoriginalmanufacturertothevehicleitisfittedinto.
NationalGlassaspartofitsproductcertificationcancutandre-markWHPandHPPVBautomotivelaminatedglassincompliancewithAS/NZS2080.