Technical Index:
| Item | Unit | Index |
| Density deviation rate | % | ±5 |
| Length deviation rate | % | ±5 |
| Soluble temperature | ℃ | ≤93 |
| Dry breaking tenacity | Cn/dtex | ≥3.2 |
| Crimp number | Piece/25mm | ≥3.0 |
| Dry breking elongation | % | 27±7 |
| Non-solubles in water | % | ≤0.25 |
| Mirabilite contents | % | ≤0.10 |