Two injection molded plastic samples were tested for mold release agent. The samples were hemispherical in shape. Contact angles were measured using water and methylene iodide (diiodomethane). The samples had been handled somewhat, so it was not surprising there was some variation in measurements at different locations. Because of this, five measurements of each fluid were made on each sample. The figure below shows a typical drop, in this case methylene iodide on sample #2.