Quote Originally Posted by George Collier View Post
I thought Benzotriazol was added to print developers to keep highlights clean. At least that's what I remember from Fred Picker.
With Phenidone based developers, I add Benzotriazole when I want Blue/Black tones.

I keep percentage solutions of both KBr and Benzotriazole handy when I'm printing. Dilution, sulfite and alkali are also "knobs" that can be used.