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Altaf Shaikh
27-Nov-2000, 12:49
Anyone try to increase the potassium hydroxide concentration in rodinol, and if any what where the results?

John Hicks
27-Nov-2000, 22:24
I'd expect it to make the concentrate stronger, but may cause problems with prec ipitates etc. Why do you want to do this?

Altaf Shaikh
28-Nov-2000, 05:48
To see what would happen

David A. Goldfarb
28-Nov-2000, 07:31
Take a look at this page ("http://www.jetcity.com/~mrjones/frodinal.htm), which has some important precautions about potassium hydroxide, but doesn't say what its function is exactly in Rodinal.

David A. Goldfarb
28-Nov-2000, 07:35
"></a>Eeek! Left out a quote mark there. That should be: Take a look at this page (http://www.jetcity.com/~mrjones/frodinal.htm), which has some important precautions about potassium hydroxide, but doesn't say what its function is exactly in Rodinal.

Ed Buffaloe
28-Nov-2000, 09:42
Potassium hydroxide is the alkaline agent in Rodinal. Increasing it will increase the activity of the developer, probably making it even more contrasty. I doubt you will see much difference from simply developing in Rodinal (1:25). My preference has always been to use Rodinal at higher dilutions such as 1:50 and 1:75, so I wouldn't bother with the hydroxide myself. But you never know until you try.