Carbon black is a major component of many rubber products and is used for reinforcement and modification of physical properties. Identifying the specific carbon black in a compound by TEM is important so that the proper carbon black can be used in formula reconstruction for optimization of the physical properties of the rubber. Determinations of type of carbon black in a compound are found by particle size distribution. Organic filler particle size can also be determined. It is important in failure analysis to determine that the appropriate carbon black/other filler has been added to the rubber compound.

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* EDX is Energy Dispersive X Ray, LOM is Light Optical Microscopy, OC is Optical Comparator, SEM is Scanning Electron Microscopy, TEM is Transmission Electron Microscopy