ABSTRACT
This chapter describes a commercial instrument with special use in paint and ink drying, with an interesting set of practical solutions and layout. The knowledge of the drying process has practical applications, for example, to determine the shortest time necessary for drying the first layer before the application of the second one. Therefore, it can be used as a case study for testing different dynamic speckle methodologies as in. The chapter follows the path developed by Amalvy, which presented a schematic description of the drying process and the corresponding dynamic speckle measurements. It employs free propagation geometry, and the observed speckle pattern is detected by the camera though a narrow interference filter. Corrosion grade was also monitored in iron samples by Begeman et al. who developed a theoretical model, presented experimental results, and proposed the technique as a potential tool in nondestructive testing of metal corrosion.
