[pure-silver] Re: SPAM DETECTED: Re: Viradon vs KBT
- From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 06 Nov 2004 00:50:43 +0100
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
Ralph W. Lambrecht
On 11/5/04 11:07 PM, "Richard Knoppow" <dickburk@xxxxxxxxxxxxx> wrote:
>
> ----- Original Message -----
> From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx>
> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx>
> Sent: Friday, November 05, 2004 2:00 PM
> Subject: [pure-silver] Re: SPAM DETECTED: Re: Viradon vs KBT
>
>
>> The toning-stop bath should be a 10% sodium sulfite
>> solution used right
>> after toning (well I rinse for a minute prior). KHCA stock
>> is a 20% sodium
>> sulfite solution but at working strength only provides 4%,
>> which is not
>> strong enough, as Richard mentioned. I hate to 'waste'
>> KHCA stock as a
>> toning-stop and will get some sodium sulfite to prepare
>> the required sulfite
>> solution at much less cost.
>>
>> BTW, I have gone to a Viradon 1+48 solution, which is
>> working fine now. The
>> sulfur deposit seems to happen only initially. I ran the
>> solution through a
>> coffee filter the next day, and it did not re-occur, but
>> it still toned
>> strongly.
>>
>>
>>
>>
>>
>> Regards
>>
>>
>>
>> Ralph W. Lambrecht
>>
> KHCA is a 10% solution, the working solution is 2%. KHCA
> stock is probably satisfactory as an after toing bath but is
> expensive compared to plain sulfite.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
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