Hi David,

Normal mechanisms of Ag tarnishing are:

Diffusion of copper (do you have a brrier layer of Ni/Pd??)

Presence of sulphides in the atmosphere.

Organic stuff in packaging materials.

Best Regards,

Ken McGowan.
  ----- Original Message ----- 
  From: David 
  To: [log in to unmask] 
  Sent: Monday, April 09, 2001 1:53 AM
  Subject: [TN] Immersion silver boards tarnish


  Has anyone ever exeprienced immersion silver MSP boards tarnishing, turned yellow after stored in ambient condition?