Re: sodium citrate, ammonium citrate, bleeding of borders

From: Clay <wcharmon_at_wt.net>
Date: Tue, 25 Jul 2006 05:34:57 -0500
Message-id: <37A91135-373B-4E1B-A5EF-29508488E3E3@wt.net>

That stuff is very effective. I keep an eye on the clock, though,
because it can bleach palladium prints if you leave it in the baths
too long.
On Jul 24, 2006, at 9:43 PM, Ender100@aol.com wrote:

> Clay,
>
> I forgot to mention I am using 3 successive baths of PermaWash for
> clearing and it works great.
>
> Mark
>
> 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
>
>
>
>
>
>
> 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
>
>
Received on 07/25/06-04:35:16 AM Z

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