FWIW, Photographer’s Formulary sells their Pyrocat developer in a glycol
solution. I use those kits, saves a lot of trouble In mixing. Worth the extra
expense, at least to me.
Mark S
Sent from my iPhone
On Oct 25, 2021, at 3:24 PM, John Stockdale <jstoc@xxxxxxxxxxxx> wrote:
I know that phenidone in 95% food grade ethyl alcohol did not last well for
me. Maybe the 5% water allowed the deterioration.
I found another use for the remaining alcohol.
At the APUG site there are reports of phenidone dissolving well in propylene
glycol at 30gram/Litre.
I use Dimezone S which dissolves more easily.
Let us know how you go,
cheers, John
===================================
On 26/10/2021 12:44 am, titrisol (titrisol) wrote:
Tim=============================================================================================================
Isopropyl is the least hygroscopic of the 3, so my guesstimation is that IP
would be best.
Pablo
On Monday, October 25, 2021, 09:15:09 AM EDT, Tim Daneliuk
<dmarc-noreply@xxxxxxxxxxxxx> wrote:
On 10/25/21 8:10 AM, titrisol (titrisol) wrote:
Tim
Patrick Gainer was an advocate of diluting phenidone in alcohol or
propylene-glycol for his one-shot developers. (2004- PhotoTechniques
Magazine article attached)
The type of alcohol could influence the life of your solution (hygroscopic
or not), but not the solubility.
I used PG when I tested these developers and the Phenidone solution was
good 3yrs later
The small amounts of alcohol shouldn;t change the developer action; I
think HC-110 used prop-glycol anyway
Hope this helps
PABLO
Indeed it does thanks. Among the available alcohol choices, I have 99%
Isopropyl,
Ethanol, and Denatured. The latter I won't use because of the denaturing
agent.
From the POV of changing solution life, which is likely to fare better,
Isoporpyl or ethanol do you think?
--
----------------------------------------------------------------------------
Tim Daneliuk tundra@xxxxxxxxxxxxxx
PGP Key: http://www.tundraware.com/PGP/
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