[pure-silver] Re: baking soda as wash aid
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 17 Feb 2005 16:15:31 -0500
>> Sodium bicarbonate solutions become more alkaline with age
-----------
As I said, I think you misread my statement; it's easy to read carbonate
instead of bicarbonate, especially after reading a lot of emails.
I think you will agree that sodium bicarbonate is already the acid salt
of carbonic acid and cannot absorb C02.
>What happens is actually the opposite, the pH of carbonate falls.
=20
This of course is correct when speaking of carbonate.
Jerry
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Ryuji Suzuki
Sent: Thursday, February 17, 2005 3:00 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: baking soda as wash aid
From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
Subject: [pure-silver] Re: baking soda as wash aid
Date: Thu, 17 Feb 2005 14:51:57 -0500
> I would recommend this only if a fresh solution was used each time.=20
> Sodium bicarbonate solutions become more alkaline with age slowly=20
> appoaching the pH of sodium carbonate. This can cause the emulsion=20
> soften.
You have a very strange belief.
What happens is actually the opposite, the pH of carbonate falls.
--
Ryuji Suzuki
"Keep a good head and always carry a light camera."
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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