Last edited by evan clarke; 16-Feb-2012 at 12:38. Reason: Operator error
Anyone knows where you get catechol in Canada?
Dang, Jay...you are about to drag me back to pyro...
Might be worth a try?
Jay, a little mistake.
"Dilute 1:500 with 6.66% carbonate solution (sodium or potassium, depending on which metabisulfite is used in the OA stock solution). 1 liter of Obsidian Aqua makes 500 liters of working solution. " You need a carbonate dilution with 6,66g in each liter (1000 ml), and this means 0,666% not 6,66%. This solution have a pH of 11,14.
I suppose when you mix with the catechol and metabisulfite of part A, the pH lower to around 11.
Your mention of "produces no fog or general stain" drives me to ask... would this developer be a better choice than others when using older films from the freezer that may have a growing density of base + fog as they age (i.e. Super-XX)?