Well, Brian, I went to Ernst Dinkla's web site and read his intro (haven't yet downloaded the Spectrum Viz.app, but will). His discussion suggested a number of other links, one of which was Aardenburg Imaging and Archives. I just finished reading his article: On the Use of Optical Brighteners in Fine Art and Photographs". I better understand your comments regarding Epson Exhibition Fibre paper.
I feel I am back to square one! I am beginning to more greatly appreciate that establishing a well integrated set of printmaking materials (paper, matte, framing, glazing) is a more complicated and inter-dependant set of choices than I had imagined...
Eric, I like the idea of being able to use both sides of the paper. Are there any "Gotchas" that you have discovered with using double sided papers? By the way, what is QTR?
unesco, thanks for your recommendations. I will check them out.