The Standard Proofing Paper, semi matte.
The Epson Proofing White Semi-Matte 256 gsm has a continuing test at Aardenburg-Imaging.com and shows so far a good fade resistance + paper white stability. The Epson Standard Proofing 205 gsm has no test running anywhere I guess, the spectral plot shows more OBA content in the paper base than the EPWSM has and somewhat less reflection in the rest of the visual spectrum. so slightly more prone to a paper white shift in time. Nothing extreme compared to a lot of normal RC papers. Whether today's RC paper construction stands time on the mechanical aspects is hard to predict, we need tests for that too.
Met vriendelijke groet, Ernst
http://www.pigment-print.com/spectralplots/spectrumviz_1.htmDecember 2014 update, 700+ inkjet media white spectral plots
