[pure-silver] Re: Phenidone in propylene glycol vs glycerin
- From: Claudio Bonavolta <claudio@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 18 Feb 2010 20:58:27 +0100
Thanks for your feedback Krisztian, you're right, all articles I found on the
web mention heating glycerin before dissolving the phenidone.
I'll give it a try.
Claudio Bonavolta
http://www.bonavolta.ch
----- Message d'origine -----
De: Horvath Krisztian <hkcsii@xxxxxxxxx>
Date: Thu, 18 Feb 2010 16:03:15 +0100
Sujet: [pure-silver] Re: Phenidone in propylene glycol vs glycerin
À: pure-silver@xxxxxxxxxxxxx
Once I put it into glycerin, just because I had that. It took around two weeks
to dissolve, since the glycerine was at room temperature, but after that worked
properly for a year or so until I used all. Maybe the phenidone dissolves
faster if you rise the temp of glycerine in hot water bath (this works well
with metol and hídroquinone for sure). Anyway, I souped a Pyrocat-MC-like
staining developer with hidroquinone substituted for cathecol in glycerine, and
never had any problem with viscosity at all, and if you rise the temperature at
mixing, the glycerine will be much less viscous.
Krisztian
2/18/2010 3:32 PM keltezéssel, Claudio Bonavolta 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
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