Needing details on metallography techniques of Silver or Silver based alloys.
Dear Nitin you can try 50% H2O2 + 25% NH4OH + 25% H2O solution
http://www.sciencedirect.com/science/article/pii/S0921509306020831
This paper may help you to sort out your problem. Best wishes...
I didn't find any literature on how these copper or other metal grids are made. Do you have any literature or idea about it?
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what are the main points
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