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Hydroglyphics: Demonstration of Selective Wetting on Hydrophilic and Hydrophobic Surfaces

A visual demonstration of the difference between hydrophilic and hydrophobic surfaces has been developed. It involves placing a shadow mask on an optically clear hydrophobic plastic dish, corona treating the surface with a modified Tesla coil, removing the shadow mask, and visualizing the otherwise invisible message or pattern by applying water, thus entitled as hydroglyphics.