Removability
Removing the penetrant from the surface of the sample, without removing it…
Dimensional Threshold of Fluorescence
The dimensional threshold of fluorescence is a property that is not currently…
Penetrant Testing Materials
The penetrant materials used today are much more sophisticated than the kerosene…
Where Is Non-Destructive Testing Used?
Depending on how broadly you define NDT you could say that it’s…
What Is NDT—A Closer Look
We’ve already covered what NDT stands for and how the phrase is…
The Benefits of Laser-Based Inspection
Lasers have been used in the welding industry for over 30 years…
Laser-based inspection
Laser shearographyLaser shearography uses an interferometer to detect the out-of-plane derivative of…
Basic Principles of Liquid Penetrant Inspection
Liquid penetrant inspection (LPI), also known as dye penetrant inspection (DPI) or…
Coating thickness measurement methods
Various methods of NDT are used for the measurement of coating thickness…


