Strange, it only got a new name in my opinion, the paper is the same as the old 4804 that did not emphasize B&W as its focus. Nor did the Sihl representative mention that aspect when he brought me the Sihl Masterclass qualities. The Tecco Baryt Ivory BTI 290 gsm is close to the two mentioned here. A warm non-cotton baryte/fiber quality, few around. The B&W labelling is a trend these days and covers both warm and cold/neutral papers now.
Met vriendelijke groet, Ernsthttp://www.pigment-print.com/spectralplots/spectrumviz_1.htm
December 2012, 500+ inkjet media white spectral plots.