Figure shows the typical patterns that are formed on the surface of such coatings of various thicknesses after they are immersed in pure water or a salt solution. Patterns develop in saline water more slowly than in pure water. An example of which is presented in Figure , where a 650 µm thick H-PDMS film was submerged in 0.6 M salt solution. In this case, evolution of small random spots on the surface preceded the development of complete pattern.