Brown Grade
Uncoated recycled kraft liner board with medium strength and burst factor.
- Substance150–250 GSM
- Caliper210–350 microns
- Grades listed11
- CategoryBrown Grade
Typical end use
- Corrugated box
- Inner card board
Other features
- Good moisture barrier inside
Board structure
- Layer 1: Kraft pulp
- Layer 2: Recycled kraft waste
- Layer 3, 4 & 5: Recycled kraft waste
Base board properties
| Substance (GSM)TAPPI T 410 | Caliper (microns)TAPPI T 411 | Bulk (cc/g) | Stiffness (15°) Taber (mNm) | |||
|---|---|---|---|---|---|---|
| MD | CD | Ratio | GM | |||
| 150 | 210 | 1.40 | 76 | 33 | 2.3 | 50 |
| 160 | 224 | 1.40 | 98 | 43 | 2.3 | 65 |
| 170 | 238 | 1.40 | 110 | 48 | 2.3 | 73 |
| 180 | 252 | 1.40 | 123 | 54 | 2.3 | 81 |
| 190 | 266 | 1.40 | 137 | 60 | 2.3 | 91 |
| 200 | 280 | 1.40 | 145 | 63 | 2.3 | 96 |
| 210 | 294 | 1.40 | 153 | 67 | 2.3 | 101 |
| 220 | 308 | 1.40 | 169 | 74 | 2.3 | 112 |
| 230 | 322 | 1.40 | 225 | 98 | 2.3 | 149 |
| 240 | 336 | 1.40 | 268 | 117 | 2.3 | 177 |
| 250 | 350 | 1.40 | 292 | 127 | 2.3 | 193 |
| Tolerance ± 3% | ± 5% | ± 5% | ± 15% | |||
Other properties
| Property | Side | Unit | Value |
|---|---|---|---|
| Burst Factor | – | – | 20 to 24 As per customer requirement |
| Cobb | Top | g/m2 | 30 - 40 |
| Cobb | Bottom | g/m2 | 40 - 50 |
| Brightness | – | % | 70 (Min) |
| Plybond | – | ft.lbf/in2 | 75 (Min) |
| Smoothness | Top | ml/min | 250 (Max) |
| Moisture | – | % | 5.5 - 6.5 (150 - 210 GSM) |
| Moisture | – | % | 6.5 - 7.5 (210 - 250 GSM) |
| Ash | – | % | 10.0 (Max) |
| Trim reel width | – | cm | 160 (Max) |
| Reel OD | – | cm | 120 (Max) |
| Core ID | – | cm | 7.6/15.2 |