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
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Tim Isopropyl is the least hygroscopic of the 3, so my guesstimation is that IP would be best.============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.
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?
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