Paddy has to be dehusked and polished to convert it into the marketable form of white rice. In the past, dehusking of the paddy was done manually by pounding the paddy in a receptacle with a wooden stump. This was later replaced by mechanical dehusking with the use of rubber rollers, which gave a greater dehusking efficiency and less grain breakage. When Malaysia started her factories in the 1970’s, the rollers produced were based on silica-filled styrene-butadiene rubber (SBR) compounds because of their longer service life and better thermal stability compared to natural rubber (NR) rollers. However, lately many alternative materials such as acrylonitrile rubber especially the carboxylated grades, polychloroprene rubbers, EPDM, etc. were being used to give even longer service life than the SBR rollers.