3.1 These test methods are intended mainly for referee purposes but may be used for quality control of masterbatch production. They may also be used in research and development work and for comparison of different rubber samples in a standard formula.

3.2 These test methods may also be used to obtain values for customer acceptance of rubber.

1.1 These test methods cover the standard materials, test formula, mixing procedures, and test methods for the evaluation and production control of pigmented types of styrene-butadiene rubbers (SBR). This includes the pigmented SBR oil masterbatches.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.