Group 1	Group 2
Mooney viscosity ML 1+4 (100°C)	72 - 84	61 - 71
Rebound elasticity, max	1.9	1.5
Tensile strength, mPa
23°C, min	30.4	30.4
100°C, min	21.6	21.6
Weight losses at drying, %, max	1.2	1.2
Ash content, %, max	0.35	0.35
Metal content
iron, %, max	0.003	0.003
titanium, %, max	0.05	0.05
copper, %	0.0001	0.0001
Stearic acid, %	0.5 - 1.5	0.5 - 1.5
Antioxidant, non-staining, max	1.3	1.3

Packaging:
30+/-1 kg bales, wrapped in PE film (115°C melt).

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	Type I	Type II
Mooney viscosity ML 1-4 (100°C)	75 - 85	65 - 74
Viscosity spread within a batch, max.,	8	8
Plasticity	0.30 - 0.35	0.36 - 0.41
Plasticity spread within a batch, max.,	0.05	0.05
Elastic recovery after determination of plasticity, mm, max.,	1.8	1.7
Ultimate elongation, %, min	800	800
Ultimate tensile strength, MPa (kgF/sq. cm.), min
23°C	30.4 (310)	30.4 (310)
100°C	21.6 (220)	21.6 (220)
Ash content, %, max	0.5	0.5
Metal content
Copper	0.0001	0.0001
Iron	0.004	0.004
Titanium	0.06	0.06
Loss of mass at 105°C, %, max.,	0.6	0.6
Stearic acid content, %	0.6 - 1.4	0.6 - 1.4
Antioxidant content, %	0.25 - 0.80	0.25 - 0.80

Packaging:
30+/-1 kg bales, wrapped in PE film (115°C melt).