Obsidian Aqua, catechol staining developer

[Jay DeFehr]

Hi John,

I'm very happy with this developer. If you decide to give it a try, and have any questions, don't hesitate to contact me--

jdefehr@gmail.com

[John Fink Jr.]

Thank you Jim, count on it:-)

[mikoyan]

Hello
First try with OA
Ilford Hp5+ 120 @200, Rolleiflex
Presoak 4 min
OA 1+500 9'30@25°C, 20 sec. agitation at beginning, and then 3 inversion at 7', 4'30 and 2'.
Water bath stop
Fix with RXN 1+7 4 min
Washing during 20 minutes, in order to remove a slight magenta cast
4 min in distilled water + Ilfotol
The film is drying now, it looks very good !

[coisasdavida]

Not sure if anyone asked this before, but here it goes:
Cookbook says generally bisulfite may substitute metabisulfite. Cookbook also says bisulfite is used as a preservative in pyro developers.
Jay, can bisulfite be substituted for the metabisulfite you list in your formula?
Thanks, Gui

[mikoyan]

Very good dev for Delta 100, Hp5+, TMY-2, Acros 100, Rollei Retro 80S, Foma 400

[Andrew O'Neill]

Canadians looking for chemicals, try Nymoc in Toronto. That's where I get mine. Email John Burrows at nymoc@bellnet.ca.

[Jody_S]

Canadians looking for chemicals, try Nymoc in Toronto. That's where I get mine. Email John Burrows at nymoc@bellnet.ca.

Thanks. Never heard of them, I just sent a message. I was having trouble getting alkaline fixer shipped to Canada (without paying $40 for shipping).

[mikoyan]

And good result with PanF+ and FP4+.
OK, i had a lot of exposed rolls waiting in the fridge