A4 copy paper technical specification,
| Grammage g/m2 | 70+2 -0.5 | 75+2 -0.5 | 80+2 -0.5 | 85+2 -0.5 |
| Thickness um | 99±1 | 103±1 | 109±1 | 110±1 |
| Ashes % | 16-18 | 19-21 | 20-22 | 20-22 |
| Surface absorption g/m2 | ≤35 |
| Base weight tolerance % | ≤5 |
| Opacity % | ≥90 | ≥92 | ≥92 | ≥92 |
| breaking length(direction) km | ≥4.3 |
| Folding Endurance Time | ≥12 |
| Moisture % | 5.0-5.5 |
| Expansion and contraction % | ≤+2.5 |
| Stiffness mN.m | ≥0.40/0.20 | ≥0.50/0.25 | ≥0.60/0.30 | ≥0.60/0.30 |
| Whiteness % | 108-110 |
| CIE | ≥164 |
| Color | L≥91 a 3.1-3.5, b -18.0±0.3 |
| Smoothness s | ≥25 | ≥25 | ≥25 | ≥33 |
| Top and back smoothness tolerance % | ≤25 |
| Dirt count pc/m2 | 0.2-0.5 mm2≤150; 0.5-1.5 mm2≤4; ≥1.5 mm2 wont have
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