Our technical glossary on the topic of coating thickness measurement, material analysis and the characterization of surfaces.

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Pore testing / Holiday testing
Pore testing

The test method is based on the fact that all electrically insulating coating materials have a much higher disruptive strength than air. Pore detection  occurs at the defective spots through a spark-over (short circuit) between the test electrode and the conducting base. A defective spot may be a thin air channel (pore, crack) or a coating that is too thin over the conducting base underneath.


Primary filter
Primary filter

Special filters optimise the energy distribution of the primary X-radiation for a given application, absorbing any undesired spectral components of the radiation. Depending on the instrument type, either individual fixed filters or removable multi-filters are employed.

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