What is the BA Finish?
BA finish, or Bright Annealed finish is similar to a #8 mirror finish or a chrome finish. While quite uniform, the finish is done at the steel mill and may vary slightly from batch to batch of material. You'll find the BA finish on the inside of dishwashers, laundry machines, refrigerators, etc. The bright annealed finish is achieved by heating up and cooling (annealing) in a controlled environment.
Bright heat treatment after cold rolling.