Molded plastic parts may be designed with a variety of surface finishes, from glossy polish to a rough texture.
The choice of surface finish is normally based on cosmetic considerations. A glossy finish can enhance the appearance of a part, while a textured surface may help to mask sink marks or parting lines.
Surface finish should be specified so as not to interfere with ejection of the part from the mold. The smoother the finish, the more easily the part will be removed from the mold. An extremely rough surface may function much like an O.D. undercut, preventing the part from slipping easily from the mold.
When not otherwise specified, we adhere to the surface finish standards of the Society of Plastic Engineers and the Society of Plastic Industries.