It can be removed by gently erasing with the larger Faberbond rubber
erasures, but I found that the tarnishing does not seem to affect the
solderability, at least not with a good solderpaste such as Kester R562.

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Thursday, September 07, 2006 2:58 PM
To: [log in to unmask]
Subject: [LF] Immersion Silver and tarnish

Are cardboard ESD boxes a source of sulfur that could tarnish Immersion
Silver PCBs?
If you have tarnish on a PCB, would you ever try to remove it with an
eraser?

Just wondering...

Genny 

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