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: [log in to unmask]>David

To: [log in to unmask]>[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?