[pure-silver] Re: Adding Pot Bromife to PC-TEA
- From: "Gene Johnson" <genej2@xxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 7 Jan 2005 09:52:44 -0800
And you're now using 50/50?. How big of a ph change did that cause?
----- Original Message -----
From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, January 07, 2005 8:59 AM
Subject: [pure-silver] Re: Adding Pot Bromife to PC-TEA
> One of the reasons I started using a mixture of TEA and propylene glycol
for the
> developer is that it allows me to control the amount of TEA and hence the
pH of
> the working solution and still have a waterless concentrate. One can
achieve a
> lower pH than for Gainer's formula by adjusting the ratio of glycol to
TEA.
>
> Many years ago there was a product (can't remember the name) to stop
prints from
> curling. You soaked the washed prints in a bath made by diluting this
stuff and
> then dried them. The product was based on one of the glycols.
>
> There is an OTC treatment for "swimmer's ear" which is 2% acetic acid in
> glycerin. Works great to getting earwax out.
>
> -----Original Message-----
> From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx]
> On Behalf Of John Black
> Sent: Friday, January 07, 2005 11:31 AM
> To: pure-silver@xxxxxxxxxxxxx
> Subject: [pure-silver] Re: Adding Pot Bromife to PC-TEA
>
>
>
>
>
> > I never measured the temperature. I will do that when I make another
> batch
> > (which may be awhile). I think Gainer stated in either his article in
> > PhotoTechniques or in a post on the net that the ascorbic acid would
> eventually
> > go into solution without heating after a few days.
> >
>
> I will try this and see how little heat is necessary for solubility of the
> ascorbic acid. I would prefer one of the more fluid glycols over methanol
but
> want to avoid the excess heat. I will let you know about the temp.
>
> BTW, since glycerol can be used (although in larger concentration) to
prevent
> curling in paper, I wonder if either of the glycols might have a good
effect on
> curling of paper of film? On second thought, the washing surely removes
it so
> it probably doesn't.
>
> OT, propylene glycol is a great cerumenolytic (dissolves earwax) and can
be used
> to good effect in cleaning out obstructed ears. Perhaps a good use for
outdated
> HC110?
>
> JB
>
>
>
>
>
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