Re:HIE Developers

[Gary Beasley <beasleyglb@xxxxxxxxxxxxxx>]

>Hi Everyone:
>     Thanks all for the imput of yesterday.  I still would like to use
Rodinal
>as a first choice for development, but I still don't understand about
exhaustion
>.  I dilute the concentrate 1:50 and develop at 68 degrees for12 minutes and
>like I said - get great results.   As the concentrate is exposed to the
air it
>gets a deeper brown and as I have been told, it is unuseable.  How long can I
>use this??  Do I have to alter the dilution in order to compensate for the
>exhaustion and aging process??   As usual any help will be appreciated!!
>
>Kudos to All!!!
>
>Larry M.
>
I used to used a hypodermic syringe and stab the rubber stopper through and
the bottle would last an incredibly long time. However I didn't notice an
appreciable loss of strength when the developer discolored moderately. You
may try a dip test with your leader scrap and determine the time necessary
for fresh rodinal to bring up visible density and test it every time you
mix a batch. If the time extends much you can either try to calculate
extensions of the developer times based on the dip test times or, easiest,
go buy a new bottle.
Gary Beasley
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