This study investigates the ability of mechanical polishing to enhance the surface properties of sculpting clay ceramics without the use of glaze. To accomplish this, a ceramic tile machining system capable of efficient grinding and polishing was developed and utilized. Through experiments conducted under various conditions, key processing parameters— including tool rotational speed, applied pressure, and feed rate—were determined experimentally, resulting in significantly improved surface quality of the ceramic specimens. Analyses of glossiness, surface roughness, and contact angle confirmed notable enhancements in surface characteristics after polishing. These results demonstrate that a mechanically polished surface can achieve quality comparable to, or even surpassing, that obtained through traditional glazing processes, suggesting the potential to replace conventional glaze coatings with a mechanical polishing approach.

The goal of this paper is to investigate the effects of out-of-plane deposition angle on product characteristics of a UV photo-curing process. Specimens are manufactured from a commercialized UV photo-curing machine, the NOBEL V1.0. The influence of the out-of-plane deposition angle of the specimen on surface characteristics, including morphology of the sloped surface, pick-to-pick distance of convex region, and roughness of the sloped surface, is examined via the observation of the sloped surface. In addition, the influence of the radius of curvature of the specimen on the surface roughness of the sloped surface is evaluated. The effects of the out-of-plane deposition angle on impact strength of specimens are investigated via Izod impact experiments. Finally, we discuss the influence of the out-of-plane deposition angle on failure characteristics of specimens for impact loads.