One thing I forgot to mention in the first post. It was interesting to look at the appearance of the vintage photographic prints. All were quite warmtone and generally lower contrast than modern papers. I didn't see any gleaming white highlights - most high tones were somewhat subdued. Reminded me of the Foma 123 velvet stipple paper. This was across the prints of half a dozen or more photographers so I suppose it was inherent in the materials of the era.