Increasing potassium hydroxide concentration in rodinol. : LUSENET : Large format photography : One Thread

Anyone try to increase the potassium hydroxide concentration in rodinol, and if any what where the results?

-- Altaf Shaikh (, November 27, 2000


I'd expect it to make the concentrate stronger, but may cause problems with precipitates etc. Why do you want to do this?

-- John Hicks (, November 27, 2000.

To see what would happen

-- Altaf Shaikh (, November 28, 2000.

Take a look at, November 28, 2000.

">Eeek! Left out a quote mark there. That should be:
Take a look at this page, which has some important precautions about potassium hydroxide, but doesn't say what its function is exactly in Rodinal.

-- David Goldfarb (, November 28, 2000.

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.

-- Ed Buffaloe (, November 28, 2000.

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