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In new solution after doing 35 pieces my rhodium pieces started looking black

2006

What are the reasons for a piece done rhodium to look black?
The only change done in my process of last three years is started using magnetic stirrer with this J2 rhodium bottle.
Please suggest me the answer so as the mistake should not repeat in future as well how can I use that same rhodium solution in which my pieces are getting black by adding any additives.

Sandesh C Penkar

2006

Step one is to ask the company that you bought the plating process from. If it is a home brew system, You probably should have bought a proprietary plating bath from a reputable vendor that has technical service support.
Finally, you have not provided a single detail of your process or what metal was being plated. How can anyone really help?

James Watts
Navarre, Florida

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