Following the drying of spray paints using space and time contrast of dynamic speckle

Abstract

The short drying times of spray paints are of great benefit in some applications, and this property allows for painting over almost immediately. However, this fast-drying process precludes following it using conventional techniques. In a previous article, we used the dynamic speckle to follow the drying process of solvent-based and water-based paints with relatively long drying times, and recently we developed alternative speckle contrast methods to characterize faster processes. This article presents the application of these methods using dynamic speckle techniques to study the drying of a spray paint. Activity image display is also included.