PROPERTY
STR XL
STR 5L
STR 20

Dirt Content, %wt, max

0.02
0.04
0.16

Ash Content, %wt, max

0.40
0.40
0.80

Nitrogen Content, %wt

0.50
0.60
0.60

Volatile Matter, %wt, max

0.80
0.80
0.80

Initial Wallace Plasticity Po, min

35
35
30

Colour Lovibond, max

40
60
-

Plasticity Retention Index (PRI), min

60
60
40

Mooney Viscosity

-
-
-