[pure-silver] Re: Adding Pot Bromife to PC-TEA
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: "'pure-silver@xxxxxxxxxxxxx'" <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 7 Jan 2005 11:59:43 -0500
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 Perhaps a good use for outdated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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