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#1
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Rodinal Sediment
Although I have never had a bottle of Rodinal long enough to deposit a sediment in the bottle. I was wondering if a sediment does occur, do you just decant the developer from above the deposit or give the stuff a jolly good stir to get it back into solution?
Cheers.
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#2
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Nat, I have a bottle that is about 16 years old and I used it quite recently- maybe 4 months ago. When I poured it out there was no sediment but as the bottle is white plastic it may be that there is a solid sediment in the bottom that remains solid and I just can't see it
I note that paddy in another thread has a bottle 18 years old which is still effective. Maybe he will say if his throws a deposit Mike |
#4
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I bought my Rodinal in canisters of 3 Liters each.
At this time Tetenal produced the Rodinal like the times before. So names like R09, real Rodinal, more real Rodinal or Fantasticonal did say nothing except all has been the same basic stuff from Tetenal. Building up Crystals over some month has been typical to my charges; sometimes less, sometimes more. I didn't care and my developer worked fine. The last canister I have bought approx. 4 to 5 years ago, probably 5 years. I opened it last year after a long darkroom break, I didn't care about some chrystals - and it developed busy as usual. |
#5
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Rodinal contains caustic potash. With the carbondioxide of the air it changes to potassium carbonate which is far less soluble. This are the crystals at the bottom.
Rodinal is fine wven with that crystals and oes not need decanted. However, I always discard the very last drops in a bottel around 20 ml of a half liter bottle. May be this is superstition ... |
#6
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I recently had a 100ml bottle of Foma's R09 go bad on me and completely lacking any development activity. On dilution a flocculent precipitae was produced and on rinsing the bottle out, a thick crust of crystalline deposit was apparent.
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#7
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Disposing of 'dead' Rodinal...
Quote:
Does anyone know the best and safest way to get rid of it, other than in small amounts down the toilet? Terry S |
#8
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The last pack of RO9/one shot, a soft pac, I had over 2 years and used down to the last drop, some crystals in the bottom, bu7t I crushed them in the pack and they worked fine, I now have a bottle of Adox Rodinal, which I have used before, and I have used Rodinal supplied in glass bottles, not much in the bottle but enough for 5 0r 6 films, again with crystals in the bottom of the bottle, it was black as tar, but again I crushed the crystals when they came out and again as good as fresh rodinal, they only version I personally found that died on me was the old formulation from Adox, APH09, never got beyond 1/2 a bottle
Richard
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#9
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Thank you all for the information.
The link to pentaxpete was a bonus. Cheers.
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