Investigation of Morphological Instability. The H-PDMS films of six different thicknesses, 50 µm to 700 µm, were soaked in distilled water and three different concentrations of aqueous salt solution, i.e., 0.1 M, 0.3 M and 0.6 M and pure distilled water. The surface instability patterns were from the images taken with a INFINITY photo-optical inverted microscope that was connected to a CCD camera and a video recorder. Five images were taken by translating the microscope to different positions using horizontal and vertical stages. The results of image characterization of the same sample were averaged for more accurate results.