This past week, I experimented with split toning Slavich paper sepia/blue. I found that the Bromportrait 80 glossy embossed "silk" surface (above) sepia tones beautifully but does not hold enough of the blue to make use of that color practical. On the other hand, Unibrom 160 matte surface split tones very well, often more subtly than in the example shown below.
