Duplex Grade
Uncoated recycled paperboard with a white back.
- Substance180–230 GSM
- Caliper252–322 microns
- Grades listed5
- CategoryDuplex Grade
Typical end use
- Inner card board
- Textile box
- Match box
Other features
- High brightness in uncoated boards
- No folding cracks
Base board properties
| Substance (GSM)TAPPI T 410 | Caliper (microns)TAPPI T 411 | Bulk (cc/g) | Stiffness (15°) Taber (mNm) | |||
|---|---|---|---|---|---|---|
| MD | CD | Ratio | GM | |||
| 180 | 252 | 1.40 | 37 | 16 | 2.3 | 24 |
| 190 | 266 | 1.40 | 43 | 19 | 2.3 | 28 |
| 200 | 280 | 1.40 | 50 | 22 | 2.3 | 33 |
| 210 | 294 | 1.40 | 58 | 25 | 2.3 | 38 |
| 230 | 322 | 1.40 | 76 | 33 | 2.3 | 50 |
| Tolerance ± 4% | ± 5% | ± 5% | ± 15% | |||
Other properties
| Property | Side | Unit | Value |
|---|---|---|---|
| Cobb | Top | g/m2 | 20-30 |
| Cobb | Bottom | g/m2 | 30-40 |
| Brightness | – | % | 75 Min |
| Plybond | – | ft.lbf/in2 | 75 Min |
| Smoothness | Top | ml/min | 250 Max |
| Moisture | – | % | 6.0-7.0 |