Re: sodium citrate, ammonium citrate, bleeding of borders

From: Clay <wcharmon_at_wt.net>
Date: Tue, 25 Jul 2006 05:33:44 -0500
Message-id: <2089033F-3EA3-4F9A-992B-07E5F72B7540@wt.net>

My thought would be that anything that gets that pH down into acidic
territory will help.
On Jul 24, 2006, at 9:43 PM, Ender100@aol.com wrote:

> Clay,
> My water here in Elgin is also slightly alkaline. Your fix for
> that is interesting. What would happen if one dropped some vinegar
> in that first water bath after the developer? I'm using PD/Na2,
> Cot 320 (usually) & Potassium Oxalate developer.
>
> Best Wishes,
> Mark Nelson
> To NSA: When you read this email, would you please search your
> database for my other black sock?
> Precision Digital Negatives--The Book
> PDNPrint Forum at Yahoo Groups
> www.MarkINelsonPhoto.com
>
> In a message dated 7/24/06 10:41:44 AM, wcharmon@wt.net writes:
>
>
>> I'll jump in here. The acidity influences the clearing of residual
>> ferric
>> oxalate from the paper. If your clearing baths are at all basic,
>> you risk
>> creating insoluble iron that gets locked into the fibers of the
>> paper. My
>> water here in Houston in the summer has a pH of 7.8 to 8.0. I
>> noticed that I
>> was having a difficult time in clearing prints if I dropped them
>> into a plain
>> water bath right after the developer and right before the first
>> clearing bath.
>> So my procedure now is to put my prints straight into a bath of
>> citric acid
>> directly from the developer. My clearing problems went away
>> completely.
>>
>> The relevance here is that if your developer has a pH above 7.0,
>> you risk
>> creating the same clearing problem with the developer.
>>
>> Clay
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Received on 07/25/06-04:34:35 AM Z

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