Board GradeAnalysis LimitationsOnce the full board analysis process has taken place it is dif昀椀cult to determine exact paper type, e.g.test-liner 1,2,3. This is demonstrated by differences in paper attributes, which have a signi昀椀cant effecton the board and box performance. The following tables illustrate the resulting differences betweensuppliers selling the same board, with paper from different paper sources.% DiffECTBCT% DiffECTBCTSupplier 1Supplier 20%~-1.5%0%~-1.5%Supplier 3~-2.7%~-2.7%Supplier 1Supplier 2Supplier 30%~-2%~-2.9%0%~-2%~-2.9%*The above are approximate hypothetical 昀椀gures, not based on tested values or actual results.Due to the varying paper sourcing methods of board manufacturers, the results from the boardanalysis method will not necessarily match the same board grade ran by another board manufacturer.A more reliable method:Gather a minimum of 12 cases that can be performance tested to assist the board manufacturer withsuggesting equivalent an board grade.Do you have a board sampleyou would like testing?YesBased on matching paperperformance or weights?Paper weightsPerformancePerform ECT and BCT tests ona bundle of cases.NoDoes the same paper weightoffer the same performance?YesUse theoretical ECT & BCTs to昀椀nd an equivalent strength seepages 6 & 7: www.allpack.uk.comDetermine closest gradebased on paper types/weightsbased on the board analysismethod.*sales@allpack.uk.comRefer to Board Analysislimitations.5( 01543 396 700
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