Specification of bitumen penetration grade 35/50BAKHTAR BITUMEN Bitumen 35/50Test methodUnitSpecificationPenetration @ 25°cIP 49Mm/1035/50Softening point °cIP 58°C50/58Kinematic Viscosity @ 135⁰CIP 370mm2/s400 minFlash point°cIP 36°C240 minSolubility is CS2(wt) %IP 47wt %99 min