Specification of bitumen penetration grade 50/70BAKHTAR BITUMEN Bitumen 50/70Test methodUnitSpecificationPenetration @ 25°cIP 49mm/1050/70Softening point °cIP 58°C46/54Kinematic Viscosity @ 135⁰CIP 370mm2/s295 minFlash point°cIP 36°C230 minSolubility is CS2(wt) %IP 47wt %99 min