[pure-silver] Re: stopbath kills fixer
- From: "J.R. Stewart" <jrstewart@xxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 24 Jan 2005 21:07:50 -0500
Ralph recently convinced me that an acid stop was important, even if using
an alkaline fix routine on FB paper. So lately I've been giving prints a 30
second acid stop followed by a 1 min fresh water rinse under agitation, then
into the TF4 alkaline fix.
Does this sound sufficient? Is 30 seconds enough time for the stop to
neutralize the developer in the emulsion... sure seems like it ought to be
but just wondering.
J.R. Stewart
----- Original Message -----
From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, January 24, 2005 8:56 PM
Subject: [pure-silver] Re: stopbath kills fixer
>
> ----- Original Message -----
> From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx>
> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx>
> Sent: Monday, January 24, 2005 3:31 PM
> Subject: [pure-silver] Re: stopbath kills fixer
>
>
>> Garry
>> I doubt it. Actually, manufacturers of alkaline fixers
>> make the use of an
>> acid stop bath mandatory to positively stop the developer
>> action.
>>
>>
>>
>>
>>
>> Regards
>>
>>
>>
>> Ralph W. Lambrecht
>>
> The problem is that if the developer is not washed out of
> the emulsion it will continue to work once it gets into the
> alkaline envirionment of the fixing bath. I don't know of
> any specific research on this as a practical problem, it may
> not be, but its at least true on principle. In non-acid
> color processing the film or paper is subjected to an actual
> wash between each step to insure there is minimal carryover
> of solutions. This works for film and RC paper but is
> perhaps problematic for fiber paper.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
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