Sa 1 (Brush Blast)
Light blast cleaning. When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter. The appearance corresponds to the prints designated Sa 1 in AS 1627.9.NOTE: Mill scale, rust or paint coating is considered to be poorly adhering if it can be removed by lifting with a blunt putty knife.