[pure-silver] Re: SPAM DETECTED: Re: Viradon vs KBT
- From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 06 Nov 2004 17:11:39 +0100
Thanks John. Looks like the mystery is solved. Apparently, the
Anchell formula is just a stronger stock solution than KHCA.
Regards
Ralph W. Lambrecht
On 11/6/04 3:59 PM, "John Meyers" <jmeyers102@xxxxxxxxx> wrote:
>
> --- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
>
>>
>> ----- Original Message -----
>> From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx>
>> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx>
>> Sent: Friday, November 05, 2004 3:50 PM
>> Subject: [pure-silver] Re: SPAM DETECTED: Re:
>> Viradon vs KBT
>>
>>
>>> Richard
>>>
>>> How do you get to KHCA being 10% sodium sulfite?
>> 'The
>>> Darkroom Cookbook'
>>> calls for 200 grams of sodium sulfite per liter in
>> formula
>>> 137. Does that
>>> not mean 20%?
>>>
>>>
>>>
>>>
>>>
>>> Regards
>>>
>>>
>>> Anchell formula is just a stronger
>>> Ralph W. Lambrecht
>>>
>> Their formula is wrong. I have no idea where they
>> got it.
>> The paper from Kodak Labs describes the working
>> solution as
>> 2% sulfite. The formula I have for KHCA is:
>>
>> Sodium Sulfite, dessicated 100 grams
>> Sodium bisulfite 25 grams
>> EDTA tetra-sodium salt 5 grams
>> Sodium Citrate 5 grams
>> Water to make 1 liter
>>
>> This is also in line with the MSDS
>> Also note that 200 grams/liter is close to the
>> saturation
>> limit for Sodium sulfite.
>>
>> ---
>> Richard Knoppow
>> Los Angeles, CA, USA
>> dickburk@xxxxxxxxxxxxx
>>
>
> Regarding the formula in The Darkroom Cookbook, it
> says that the solution should be diluted 1:9 for use.
> I give the formula for this stock solution from
> Anchell's book below. (Formula #190 in the 2nd
> edition):
>
> Water (125 degrees F) 750 ml
> Sodium Sulfite 200 grams
> Sodium bisulfite 50 grams
> Water to make 1 liter
>
> So by diluting this 1:9, one would end up with the 2%
> solution mentioned in Richard's post.
>
> John Meyers
>
>
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