Digital BW, The Print

At 11:46 PM 11/9/2008, you wrote:
>Clayton,
>because they are normally displayed behind windows anyway, would it 
>not be better to put them under  glass in the direct sun to remove 
>this contaminant factor? I appreciate that longer would be needed 
>for the test, however.

Or not!  Not knowing anything about the mechanism, I can imagine that 
behavior in a sealed cavity, where any gaseous products are somewhat 
trapped, might be different.  I doubt that this would be so, but 
would start with an open mind.

Arthur Fink

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