TY - GEN ED - BRITISH STANDARDS INSTITUTION TI - BS 1673 : Part 5/5.2 to 5.4 :Methods of testing raw rubber and unvulcanized compounded rubber : PT. 5 : Analysis of Styrene Butadiene Copolymers (SBR)- : pt. 5.2 moisture, PT 2. :pt. 3 : solvent extract , pt. 4 : total ash PY - 1964/// CY - London PB - BSI N1 - STD431 ER -