The void volume of a carbon black expressed in absolute terms, VV, is a carbon black property that reflects differences in structure for candidate carbon blacks. Structure is a generic term that is a function of the shape irregularity and deviation from sphericity of carbon black aggregates. The more that a carbon black resists compression by having substantial aggregate irregularity and non-sphericity, the greater the compressed volume and void volume.

Structure is a property that influences the physical properties developed in carbon black compounds for use in tires, mechanical rubber goods, and other manufactured rubber products.

1.1 This test method covers a procedure to measure a carbon black property called Void Volume. The void volume is obtained by measuring the compressed volume of a weighed sample contained in a cylindrical chamber when a specified compression force is applied by a movable piston with a displacement transducer on the piston mechanism.

1.2 Void volume is an important carbon black property that relates to the compounded physical properties for carbon black-filled elastomers.

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

1.4 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.