[Jewelry making - Article 00022] - Re: [Orchid] New "E-Coated" Sterling Silver in Tucson

[jesse brennan]

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    The term E coating is an electrocoating method for applying paint.
    see: http://www.ppg.com/car_indcoat/electro.htm The process is
    explained.     It seems to be a missused term here or is it a clear
    lacquer  type finish applied this way????.    It is also possible
    and more likely that this  is a vacuum deposited coating   which
    could be called evaporative coating.  Telescope mirrors are coated
    this way.  Even very cheap metalized plastic toy parts are coated
    this way.    It is also called PVD (Physical Vapor Deposition)   or
    sputtering which is almost the same.  It is widely used in making
    semiconductors. see: 

	
http://www.ee.washington.edu/research/microtech/cam/PROCESSES/physicalvapdeppdf.html

    and download the pdf file.    There is much more here than you ever
    want to know but some of it should help. 

jesse


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