[pure-silver] Re: ARISTA-EDU Ultra 100iso
- From: Jean-David Beyer <jeandavid8@xxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 22 Dec 2011 18:02:04 -0500
richard lahrson wrote:
> i checked anchell's darkroom cookbook, it lists potassium alum, quite
> different from potassium chrome alum....could be an error. rich
If you are quoting Anchell correctly, he is mistaken. Here is the
formula for Kodak SB-4 right out of their Publication J-1.
Water, 1.0 liter
KODAK Potassium Chrome Alum Crystals (Dodecahydrated) 30 grams
KODAK Sodium Sulfate (Anhydrous) 60 Grams
>
>> On Dec 22, 2011 2:28 PM, "Jean-David Beyer" <jeandavid8@xxxxxxxxxxx
>> <mailto:jeandavid8@xxxxxxxxxxx>> wrote:
>>
>> richard lahrson wrote:
>> > sb4 is a sodiun sukfate stop bath with potassium alum. i no longer use a
>> > ...
>>
>> No. It uses Potassium Chrome Alum, which is why it is hardening.
>>
>> An earlier poster remarked "The only problem with the Efke is that it
>>
>> has a REALLY soft emulsion. You have to use a hardening fixer and treat
>> it very carefully when wet."...
>>
>> Since it is already wet when it comes out of the developer, I thought
>> this stuff might help.
>>
>> My grandmother, or grandfather, just used precipitated chalk as tooth
>> powder. Tooth powder was in common use until a little after WW-II. Some
>> people use Sodium Bicarbonate alone or as one of many ingredients in
>> their teeth cleaning efforts.
>>
>> >
>> >> On Dec 22, 2011 8:04 AM, "Jean-David Beyer" <jeandavid8@xxxxxxxxxxx
>> <mailto:jeandavid8@xxxxxxxxxxx>
>>
>> >> <mailto:jeandavid8@xxxxxxxxxxx <mailto:jeandavid8@xxxxxxxxxxx>>> wrote:
>> >>
>> >> Tim Daneliuk wrote:
>> >> > On 12/21/2011 07:55 PM, Bo...
>>
>> ^^-^^ 17:15:01 up 23 days, 7:03, 3 users, load average: 5.08, 4.79, 4.70
>>
>> ====================================================================================================...
>>
--
.~. Jean-David Beyer Registered Linux User 85642.
/V\ PGP-Key: 9A2FC99A Registered Machine 241939.
/( )\ Shrewsbury, New Jersey http://counter.li.org
^^-^^ 17:55:01 up 23 days, 7:43, 3 users, load average: 5.10, 4.80, 4.68
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