[pure-silver] Re: Increasing Warmth In Ansco 115, Dassonville D-3 , et al
----- Original Message ----- From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx> 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Saturday, August 18, 2007 2:01 PM
Subject: [pure-silver] Re: Increasing Warmth In Ansco 115, Dassonville D-3 , et al 



From: "Eric Nelson" <emanmb@xxxxxxxxx>


Would there be any warmth benefit in adding anything
to the 115 formula or increasing the amounts of any of
the components?  [to increase image warmth]
You can try increasing the bromide from 4g/l stock to 10g/l 
stock, a la WW-1.

Or try Ansco 110, a hydroquinone only developer.

--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/index.htm
n o lindan at ix dot netcom dot com
There are two Agfa formulas numbered 115. The older formula, found in European Agfa handbooks contains Hydroquinone as the sole developing agent and results in great loss of paper speed and some loss of Dmax for greatest warmth. The other formula is a Hydroquinone and Glycin formula found in handbooks published by Agfa-Ansco in the U.S. If this is the one you are using there probably isn't anything which will produce warmer tones although Gevaert had some interseting very warm tone formulas. Another possibility is to try Nelson's Gold Toner. This is a direct toner which is supposed to tone all densities evenly. It is somewhat expensive because it contains some Gold Chloride. Prints toned in Nelson's must be fixed again after toning if the images are to be permanent. This step was left out of some versions of the Kodak instructions. Both Kodak and Agfa were licensed and have instructions but the best are found in the patent itself, USP 1,849,245. A PDF version of this can be downloaded from Google Patents. AFAIK, the protective effect of Nelson's has never been tested but, if the final fixing step is carried out, the images should be as stable as those from other sulfiding toners. The Gold tends to shift the color toward red a bit so it may mimic very warm tone paper better. Note that the image color of untreated silver is mostly controlled by the grain size and structure, warmer tones coming from finer grains. In general, the warmer the tone the more vulnerable the images are to polutants due to the increased ratio of surface area to mass. This is also mainly why they tone faster. 

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 
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