Table 1. Standard Malaysian Rubber Specifications of SMR 20.

Property	SMR-20
Dirt content (% max. on 40 mesh)	0.20
Ash content (% max.)	1.00
Nitrogen content (% max.)	0.60
Volatile matter (% max.)	0.80
Wallace platicity Po (min.)	30
Plasticity retension index (% min.)	40