#4 Finishes

-Architectural Finish – Also called Brushed, Directional or Satin Finish

-A #4 Architectural Finish - Characterized by fine polishing grit lines that are uniform and directional in appearance. It is produced by polishing the metal with a 80- 180 grit belt or wheel finish. (65 RA – 30 RA)

-4 Dairy or Sanitary Finish - This finish is commonly used for the medical and food industry – almost exclusively used on stainless steel. Great care should be taken in removing the surface defects in the metal – like pits – that could allow bacteria to grow. This finish is produced by polishing with a 180 – 240 grit belt. (30 RA – 20 RA)

#6 Finish

Fine Grain - This finish is produced by polishing with a 180 – 280 grit belt. (20 RA – 12 RA)

#8 Mirror Finish

“Mirror” bright finishes with clear reflection – Very light haze. All surface defects are removed. The part is buffed and then color buffed to achieve a mirror finish. The quality of this finish can depend on the quality of the metal being polished. Castings that have pits will be difficult – if not impossible polish to a #8.