Thanks for sharing this Jakobb.
Interesting though; IME, addition of gold chloride into the Ziatype (pop pd with Li2PdCl4) makes sensitizer more contrasty, giving relatively harsher tonal transitions - just the opposite of smooth. The color shift depends much on the moisture level in the paper during exposure, the lower is the RH the warmer will be the image, whereas the higher is the RH the colder will be the image. With Ziatype the smoothest results are obtained by using no additives or by adding small amounts of sodium tungstate only. (Which I don't like except for an occasional and very small addition that gives very mildly "yellow" highlights - only useful for a limited number of subjects IMHO...) Which paper was that? I haven't experienced this with Cot320, Weston and Masa papers myself...
Originally Posted by jakobb