[pure-silver] Re: Phenidone in propylene glycol vs glycerin
- From: Ronald Klein <rskmd83@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 18 Feb 2010 15:04:55 -0500
I have been using a phenidone-vitamin c in propylene glycol film developer
for some time. shelf life of this solution reached 18 months!!
Wait for wife to go out,, heat propylene glycol in microwave to about 200
degrees f, dissolve phenidone.
On Thu, Feb 18, 2010 at 9:32 AM, Claudio Bonavolta <claudio@xxxxxxxxxxxx>wrote:
> Me again ...
>
> Because the quantities of phenidone required in developers are very low and
> difficult to measure, many dissolve it in either alcohol, propylene glycol
> or glycerin at a low concentration.
>
> After googling, it looks like propylene glycol and glycerin allow a better
> shelf life of the solution, maybe with a slight advantage to glycerin but at
> the cost of being less agreable to use due to its high viscosity.
>
> Do some of you already tried both products ?
>
> What is your preferrence and why ?
>
>
>
> Thanks in advance,
>
> Claudio Bonavolta
>
> http://www.bonavolta.ch
>
--
Ron Klein MD
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