Silver-plating treatment ranges from 1 to 30 microns thickness and it may have brushed or antiqued finish.
Metallic and non-metallic materials may be silver plated by electrolysis process: that is a silver coating in the thickness required.
Silver plating in short
After removing impurities from the object surface the silverer connects it with the negative pole of a DC generator (dynamo), and immerses it in a silver salt bath, which includes also a silver plate connected to the other pole.