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Features Of A4 Paper One Copy Paper 80Gsm : Substance G/M2 80 + – 2.5 Substance Variation Cd Thickness Difference Cd % Equal To/Below 10 Brightness % 100-102 Opacity % Equal To/Below 90 Specifications PaperOne Copy paper A4 80Gsm Features Of A4 Paper One Copy Paper 80Gsm : Substance G/M2 80 + – 2.5 Substance Variation Cd Thickness Difference Cd % Equal To/Below 10 Brightness % 100-102 Opacity % Equal To/Below 90 Breaking Length Average M Equal To/Above 3200 8 Smoothness Average Of Two Sides G 20-25 Variation Of Two Sides % Equal To/Below 30 Surface Absorbing Weight G/M2 Equal To/Below 30 Shrinking Variation Cd % Equal To/Below 2.8 Folding Endurance Cd Times Equal To/More Than 15 Dirt (0.2-1.5 Mm2) Point/M2 Equal To/Below 65