Immersion Silver is limited by the nature of the reaction.  Immersion implies
that the substrate is the source of electrons needed for reduction of silver
in solution to silver metal.  This ocurrs at the expense of the substrate
metal giving up electrons and going into solution.
20 to 25 uins are acheivable if the reaction was allowed to go on for an
extended time.  The thickness of 170 - 180 uins will require a deposition
method other than Immersion.
George Milad
Shipley Co.
(516)868-8800  X  269

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