Defect inspection method by infrared thermography

摘要

PROBLEM TO BE SOLVED: To provide a method for inspecting defects by an infrared thermography which uses a quick drying paint of a high emissivity to infrared rays and a superior detection accuracy, and easy to remove. SOLUTION: The defect inspection method uses an infrared thermography for obtaining by an infrared camera 12 a thermal image of an object 2 to be inspected to which a temperature field is provided. A paint containing a carbon- based black pigment, a solvent including alcohols and an aliphatic hydrocarbon, and a dispersant is applied to a surface of the object 2. The thermal image is obtained through the applied film 3.