Digital BW, The Print

>Do you, or does anyone know if the optical brightener yellows
>with exposure to air? Or light? or a combination. I'd like to believe
>that the prints I've recently put under glass for a show will hold up
>for the next couple of months under normal gallery lighting.

If Jeff got an answer to this follow-up question of his, I missed it 
and hope someone will send it to me.

Thanks.

Sam            samcc@...