Clay, thanks for the suggestions, but I would really rather not touch potassium ferracyanide. You see, I'm a clumsy guy. I lost count of how many scars I have in my body (I've had surgery on both my knees to remove scar tissue, in fact), and am still alive today by what is most likely a mix of blind luck and an on-going bet between the gods...
Originally Posted by clay
Potassium ferracyanide is a strong corrosive, and that really worries me. The stuff eats through metal, for crying out loud. An ex-professor of mine used to work for the Dallas Morning News, and said they had a bucket of that stuff in their gang darkroom back in the 80's. Everyweek they would need a new brush, because the metal thing that holds the bristles would be eaten all the way through...
As for the developer, I wear my gloves and hope for the best, but one risk cannot justify the other, if you know what I mean.
Could you give the URL for the web page you mentioned? My google search didn't help much (but being a sepia toner, I bet it still requires bleaching).
Les, a quick look at B&H turned up Ammonium Bromide, Potassium Bromide, and Sodium Bromide. Which one are you talking about?