Also taken this spring: gold-toned kallitype on arches HP 140#. Shot with a Mamiya 7, HP5+, developed in Xtol.
And this is gold toner #2 at the end of its life. Initially, toning happens very quickly – perhaps 3 minutes for the first shot I posted. This shot toned for 15 minutes and, as you can see, took on a more sepia characteristic. This is the same 250mL of toner as the previous two, and I believe this was the fourth reuse of that toner. All three of these are 11×14.
I have actually pushed this toner farther. Beyond this point, it can take a half an hour to tone a print, and I suspect it isn’t as archival any longer.