From: Scott Wainer (firstname.lastname@example.org)
Date: 02/23/03-12:39:49 PM Z
Re: fresson printingHi all,
Just read a copy of "The Kallitype Process" from the Photo-Minature No. 47 and had a few questions for those of you who are kallitypists.
The first question is has anyone tried the formula (listed below) in the article? Up to this point I have been using the simple formula given in Christopher James' book with decent results; 1 part 20% Ferric Oxalate to 1 part 10% silver Nitrate. Since the article was written, in 1903, I would assume the quality of chemistry and paper has steadly increased to the point of not needing some of the chemicals required to obtain decent or exhibition quality prints.
Part A which calls for 48 grains gum arabic, how do you convert grains when using liquid gum arabic?
Part B calls for 1/2oz Ferric Oxalate and Potassium [K3Fe2(C204)3] which I assume would be Potassium Ferric Oxalate. Is that liquid or dry measurement? Where could I obtain it or can it be readily made onsite?
In Part D, the article calls for the use of a 6% Potassium (Bi)Dichromate solution. It has always been my understanding that the addition of dichromate causes an increase in contrast and a reduction in printing speed. Most of my negatives give a slightly contrasty print, using the James formula, that caused the shadows to go slightly dark and are brought out in a pre-fix toning bath. Would the inclusion of the dichromate solution in sensitizer cause even greater contrast?
I also read that for the most part, when the article was written, toning was done after the print had been fixed. I have always toned before fixing; is there any difference other than color in toning before the fix versus afterwards?
Thanks for the help,
Photo-Minature No. 47 Kallitype Formula
Ferric Oxalate 1 oz
Distilled Water 5 oz
Gum Arabic (picked) 48 grains
Ferric Oxalate and Potassium [K3Fe2(C204)3] 1/2 oz
Distilled Water 8
Oxalic Acid 1/2 oz
Distilled Water 4 oz
stronger ammonia (Ammonia Liq. 880) 100 minims
Bichromate of Potassium 120 grains
Distilled Water 4 oz
Sensitizer for average negatives
Part A 1 oz
Part B 1/2 oz
Part C 30 minims
Part D 4 drops
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