John, of Frank’s Kitchens. Selenium toned kallitype on Arches HP 140#.

I’m understanding selenium toning a little better as a result of this week’s PrintFest. Selenium and Kallitypes don’t get along very well generally. And now I understand why.

The sensitizer for kallitypes is Ferric Oxalate and Silver Nitrate. Usually, conversations about failures with kallitypes center around the ferric iron being reduced to ferrous iron from exposure to UV light – but with selenium ton …[more]