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Kraft Paper Descriptions Physical properties Unit Tolerance 50 60 70 80 85 90 100 110 120 140 150 160 180 Grammage g/m2 49 60 70 80 85 90 100 110 120 140 150 160 180 ±2 ±2 ±3 ±3 ±3 ±3 ±4 ±5 ±5 ±6 ±6 ...