Good Friday Morning All,
 
This topic may have been previously discussed, but let me try to phrase
my "problem" completely so the answer can be simpler.
 
I have a board vendor (Fab house) stating that for my ENIG boards the
plating only has a 6 month shelf life if the package is opened.  Did I
miss something here?  I thought Gold doesn't tarnish.
 
If this is true, then Immersion Tin, Immersion Silver and ENIG all have
storage issues.
 
OK, so I open a sealed package and take out half of the boards in the
package.  I may not need the rest of the boards for many months.  So how
do I protect the unused boards?  Should I vacuum seal them?  Add a
desiccant?  If I add a desiccant, are there different desiccants which
might damage the boards?
 
I'm sure I'll have more questions right after I send this.
 
Phil

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