[pure-silver] Re: Potassium Bromide and chlorhydroquinone
- From: Dennis Purdy <dlp4777@xxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 8 Apr 2008 22:43:08 -0700
On Apr 8, 2008, at 19:51, Don Sweet wrote:
A few weeks ago there was a discussion on this list about the possible use
of chlorhydroquinone as an anti-fogging developer for old paper, if only you
could find some. Since then I have found there is a recipe for "Maxim
Muir's Chlorhydroquinone-Substitute Developer" on page 174 of Carson Graves'
book The Elements of Black and White Printing (2ed), which provides a
work-around for the chlorhydroquinone shortage if anyone is interested.
Don Sweet
<x-tad-bigger> This formula is supposed to be good for saving fogged paper.
Defender 58-D
Water 750ml
Sodium Sulfite 16.0grams
Chlor-hydroquinone 4.0grams
Sodium Carbonate 16.0Grams
Potassium Bromide 0.6grams
Water to make 1Liter
Develop for at least 4 minutes. With more exposure and less time in the developer tones will be browner but some deepness in the shadows will be sacrificed.
Chlor-hydroquinone stays active even down into the 50s°F range. Much lower then Hydroquinone.</x-tad-bigger>
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