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TSR 20
This is one of the most popular grades of rubber, mainly used in the production of tires.
| Characteristic (TSR 20) | Thailand (STR 20) | Indonesia (SIR 20) | Vietnam (SVR 20) | Malaysia (SMR 20) |
| Dirt content on 44u aperture (max %wt) | 0.16 | 0.20 | 0.16 | 0.16 |
| Ash content (max %wt) | 0.80 | 1.00 | 0.80 | 1.00 |
| Nitrogen (max % wt) | 0.60 | 0.60 | 0.60 | 0.60 |
| Volatile matter (max %wt) | 0.80 | 0.80 | 0.80 | 0.80 |
| Wallace rapid plasticity (Po) min | 30 | 30 | 30 | 30 |
| Plasticity retention index (PRI) min % | 40 | 50 | 40 | 40 |
