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The Finished Part Blog

The Finished Part Blog

Tuesday, July 23, 2013

Polishing Brass Jewelry

Brass Jewelry Polishing
The above picture shows a piece of brass jewelry directly after molding and shaping (left) and a finished polish (right). The process to get to this finish required two steps in a barrel tumbler.

Step 1 was a cut-down step with a Precision Ceramic K-Fast Cut media and a solution of a mild acid cleaner (Kramco 1030). The combination of the media and solution removed any oxidation, sharp edges and  scratches or imperfections in the surface. The surface finish was smooth and matte and ready for polishing.

The best polish was achieved in Step 2 using a Stainless Steel tumbling media and a neutral burnishing compound (Kramco 2030). The weight of the media working with the compound and cascading action of the tumbler resulted in a bright, smooth, near-mirror surface finish.

Each step was about 2 hours in a relatively small diameter barrel tumbler.


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