1.1This practice covers a means for producers and users of emulsion styrene-butadiene rubber (SBR) to establish common target values for the Mooney viscosity of these rubbers.

1.2Mooney viscosity is a widely used measurement for rubber as defined in Test Methods D1646 where the procedure for its measurement is specified.

1.3The Mooney viscosity target value is defined as the midpoint of a Mooney viscosity specification range established by a producer or user of rubber.