Viscosity Grade Bitumen Test Method Specification VG 0 VG 30 VG 20 VG 10 Absolute Viscosity at 60°C, Poises Min. 3200 Min. 2400 Min. 1600 Min. 800 IS 1206 (Part 2) Kinematic Viscosity at 135°C, cSt Min. 400 Min. 350 Min. 300 Min. 250 IS 1206 (Part 3) Flash Point (Cleveland Open Cup,) °C Min. 220 Min. 220 Min. 220 Min. 220 IS 1209 Solubility in trichloroethylene, % Min. 99 Min. 99 Min. 99 Min. 99 IS 1206 Softening Point.(R&B), °C Min. 50 Min. 47 Min. 45 Min. 40 IS 1205 40-60 50-70 60-80 80-100 IS 1203 Penetration @ 25°C, 0.1 mm 100 gm, 5 sec. Testson residue from thin film oven tests/RTFOT i) Viscosity ratio at 60°C Max. 4.0 Max. 4.0 Max. 4.0 Max. 4.0 IS 1206 (Part 2) Min. 25 Min. 40 Min. 50 Min. 75 IS 1208 ii) Ductility at 25°C, cm, after thinfilm oven test Specific Gravity @ 27/27 °C Min. 0.99 Min. 0.99 Min. 0.99 Min. 0.99 IS 1202 Conforms to BIS (IS 73:2006) Specifications