Standard Malaysian Rubber (SMR) 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 0.02 0.02 0.02 0.05 0.08 0.08 0.08 0.16 0.16
Ash (max) % wt 0.50 0.50 0.50 0.60 0.75 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 0.80 0.80 0.50 0.80 0.80 0.80 0.80 0.80 0.80
Po (min) % wt NA NA 35 30 NA 30 NA 30 NA
PRI index (min)   60 60 60 60 50 50 50 40 40
Lovibond Color: individual value (max)   NA NA 6.0 NA NA NA NA NA NA
Lovibond Color: range (max)   NA NA 2.0 NA NA NA NA NA NA
Mooney Viscosity (ML, 1+4, 100°C)   50 +/- 5 60 +/- 5 NA NA 65 +7/-5 NA 60 +7/-5** NA 65 +7/-5**

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