Eddie

I have worked with immersion silver since the first installation in North
America. This is the first time I have heard of anyone requiring an
overcoating. In the past others have inquired, but when we pointout the
chemistry already included an inhibitor the customer seemed satisfied.

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389


----- Original Message -----
From: "Eddie Rocha" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, July 18, 2006 11:27 AM
Subject: Re: [TN] silver anti-tarnish


> Thanks Rudy and Lee. One of the other questions I had was
> if this is a typical expectation or an unusual request, to
> coat the silver with the OSP? Anybody out there requiring
> this of their fab supplier?
>
> Eddie Rocha
>
>
>
> Actually, most immersion Silver plating systems have an
> anti-tarnish as part of the plating bath, which co-deposits
> with the Silver...
>
>   And if you want to add a serious antitarnish on top of
> that, you can, as Lee Parker suggests, put an imidazole on
> top, which is also known as an OSP... the Enthone Entek is
> an imidazole...
>
>   Rudy Sedlak
>   RD Chemical Company
>
>
>
> ---------------------------------
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