Having a large plater in the Midwest try to plate our very small cellular phone screws was not a good idea nor having them finish the screws with a Trivalent Black Chromate either. Sterling was able to cut our rejection rate to our customer by 100% and keep the Trivalent Black Chromate from flaking off and keeping the screws at a consistent shade of black.......then when our customer wanted to increase the Salt Spray hours, Sterling Plating was able to add a Sealer to the Black Chromate which then met our customers specifications.