Standard Indonesian Rubber (SIR) Specification Scheme

Parameter Unit SIR 3CV50 SIR 3CV60 SIR 3L SIR 3WF SIR 5 SIR 10 SIR 10VK SIR 20 SIR 20VK
Dirt (max) % wt 0.03 0.03 0.03 0.03 0.05 0.10 0.10 0.20 0.20
Ash (max) % wt 0.50 0.50 0.50 0.50 0.50 0.75 0.75 1.00 1.00
Nitrogen (max) % wt 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60
Volatile Matter (max) % wt 0.60 0.60 0.80 0.80 0.80 0.80 0.80 0.80 0.80
Initial Plasticity (min)   30 30 30 30 30 30 30 30 30
PRI index (min)   60 60 75 75 70 60 60 50 50
Colour Lovibond Scale (individual value, max)   NA NA 6.0 NA NA NA NA NA NA
Mooney Viscosity (ML, 1+4, 100°C)   50 +/- 5 60 +/- 5 NA NA NA NA 60 +/- 5* NA 60 +/- 5*

*Not specification status, but are controlled at the producer end. These figures
are limits, not typical values. Typical values will vary by producer.