Originally Posted by
interneg
Lens flare, camera flare, emulsion halation are all factors that are routinely ignored in favour of leaping on facile chemical obsessions. The paper curve shape is where you want to look - the rest is basic process control.
Chloride papers can go quite cold blue/black quite easily - especially in very normal developers. At the end of the day, Kodak usually claimed that Azo gave a neutral black with Illustrators' Azo as a warmer variant, Velite/ Velox being colder and Athena & Aristo warmer contact speed papers.
Weston claimed to like Haloid's (who became Xerox) contact paper - but the differences between chloride contact paper formulations are often not great. It may well have been that single-weight Haloid was cheaper than the Kodak (or Agfa/ Ansco etc) product.
There were warmtone variants that used various other heavy metal salts, reverse addition steps at precipitation etc to cause particular crystal habits to from.
Bookmarks