[pure-silver] Re: baking soda as wash aid
- From: "J.R. Stewart" <jrstewart@xxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 17 Feb 2005 15:01:43 -0500
Are we talking washing soda or baking soda?
Washing soda is sodium carbonate, right?
Baking soda is sodium bicarbonate.
I have plenty of both around the house as I do a lot of laundry and get a
lot of gas/heartburn.
Does either work as a wash aid? Do neither work?
I sometimes throw a teaspoon of sodium sulfite into my upright negative
washer at the start of the laminar flow. I think (hope) it helps as it
dissolves over several minutes, baths the negatives in sulfite until it
eventually is removed by the laminar flow.
J.R. Stewart
Leesburg, VA
----- Original Message -----
From: "Christopher Woodhouse" <chris.woodhouse@xxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, February 17, 2005 2:38 PM
Subject: [pure-silver] Re: baking soda as wash aid
> Agfa still recommend Washing Soda on the paper slips in the print boxes.
> How
> quaint!
>
>
> On 17/2/05 7:05 pm, "Ryuji Suzuki" <rs@xxxxxxxxxxxxxxx> wrote:
>
>> From: "Gene Johnson" <genej2@xxxxxxx>
>> Subject: [pure-silver] baking soda as wash aid
>> Date: Thu, 17 Feb 2005 07:40:48 -0800
>>
>>> I saw on the Summitek site a suggestion for using Baking soda in the
>> print wash water as a wash aid. Any thoughts on this? Economical
>> and low tox if it works well.
>>
>> If you wash your prints in pure, deoinized water, addition of
>> bicarbonate would expedite washing. But I'm not sure if you use tap
>> water containing some. Levenson did this work in 60s.
>>
>> As a conventional wash aid bath (not a washing water additive)
>> bicarbonate is also effective, but probably not as effective as
>> sulfite in many conditions. But sulfite bath has short shelf life
>> unless iron catalysis is poisoned and radical scavenger is added.
>> Bicarbonate may keep longer as a stock solution.
>>
>> After all, I don't see a need to change sulfite wash bath though.
>>
>> --
>> Ryuji Suzuki
>> "Keep a good head and always carry a light camera."
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>
> --
> Regards Chris Woodhouse
>
>
>
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