Definitions for "Mill finish"
A finish applied by the file manufacturer to resilient floor tile, which must be removed for proper sealing and finishing.
A full worsted, timed to give a desired finish sometimes calls, inaccurately, unfinished worsted because it does not have a characteristic clear finish associated with worsted.
Mill finish is the finish obtained by standard extrusion practices and produced without the aid of any subsequent operations. This finish generally varies from a structural finish with surface imperfections to an architectural finish with uniformly good appearance.
without being subjected to a special surface treatment (other than a corrosion-preventive treatment) after the final working or heat-treating step.