Confused. All the papers suggested so far seem to be cotton-based. What wood-pulp-based papers should I be looking at?
The smoothest I know is the HP Matte Litho-Realistic 270 gsm. Alpha Cellulose and no OBA content, so warm white. I still have an old production roll, no experience with the new production version that BMG distributes now. Only available in rolls from 24" wide and up so it has to be cut.
There is the Innova IFA25 and IFA25 with similar properties, that is also available with other brand name disguises, but it has more texture than Photorag.
Otherwise I do not know papers that qualify to your criteria; matte, supersmooth, gallery wall white. The last I interpret as without OBA content. Innova has matte Fiber qualities but they contain OBAs, a lot of other mainstream inkjet papers fall in a similar category. Longevity is probably not asked as it will be mounted on MDF.
Met vriendelijke groet, Ernst
http://www.pigment-print.com/spectralplots/spectrumviz_1.htmDecember 2014 update, 700+ inkjet media white spectral plots