Manufacturing examples Hydrophobic Surface A hydrophobic surface formed on a copper alloy sample using femtosecond laser texturing. The contact angle between this surface and a water drop is 150 degrees, which means that the surface has the potential for self-cleaning, anti-icing and other properties linked to hydrophobicity. Hydrophilic Surface Hydrophilic surface properties created through metal surface micro-texturing. A sponge like aluminum surface soaks up water and spreads it evenly across the surface.