[pure-silver] Sepia Toners
----- Original Message ----- From: "Bogdan Karasek" <bkarasek@xxxxxxxxxxxx> 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Saturday, January 19, 2008 5:41 AM
Subject: [pure-silver] Re: Sodium Hydroxide = Red Devil Lye



Hello Richard,
The formula for the Sepia toner is from the "digitaltruth.com" site, under technical data section where they list 130 darkroom formulas; second down from the "massive dev chart". They have one formula for Sepia toner..... that's the one I want to try.
I'm trying to find a replacement for the Kodak Sepia Toner that was discontinued. Kodak now only sells Sepia toner II which I don't like. 

Cheers,
Bogdan
I am once again in posession of some reference material. In fact, its a new (to me) 1945 edition of the _Photo-Lab-Index_ I picked up today at a swap meet here. This one seems to have been updated for a time but most of the original material is still there. There are some intersting toning formulas in it, a couple that I don't remember seeing before. I am posting a couple of bleach and redevelop formulas because Bogdan asked about this type of toner. None I can find here use sodium hydroxide. Kodak published several Sepia toner formulas but only one is for paper. The others are for motion picture prints or lantern slides. Perhaps these would also work for paper. 

Kodak T-7a Sepia Toner

Stock Bleaching Solution A
Potassium ferricyanide                    75.0 grams
Potassium bromide                         75.0 grams
Potassium oxalate                        195.0 grams
Acetic acid, 28%                          40.0 ml
Water to make                              2.0 liters

Stock Redeveloping Solution B
Sodium sulfide, desiccated                45.0 grams
Water to make                            500.0 ml

Prepare bleaching bath as follows:
Stock solution A                         500.0 ml
Water                                    500.0 ml

Prepare redeveloper as follows:
Stock solution B                         125.0 ml
Water to make                              1.0 liter
Bleach until there is only a faint trace of the halftones remains and the black of the shadows has disappeared. Then rinse thoroughly in cold water. This should take about one minute. Then redevelop in in the redeveloper. This should take about 30 seconds. 
Wash toned prints for about 30 minutes in running water.
Note: The instructions require a hardening bath following re-development. Some modern papers may still need this, others will not. The hardener recommended is the stock hardener for Kodak F-1 fixer diluted 1:16 

Defender Re-Development Sepia Toner 4-T
Bleaching Solution
Water                                        1.0 liter
Potassium ferricyanide                      13.7 grams
Potassium bromide                           27.4 grams
Strong ammonia water (28%)                   1.3 ml

Re-Developing Solution
Sodium sulfide, saturated solution*        7.8 ml
Potassium alum, saturated solution**       1.0 liter
*To make as saturated solution of sodium sulfide dissolve 15.0 grams of the sulfide, fused, or 42.0 grams of sodium sulfide, crystals, in 100.0 ml of water at 65F.
**To make a saturated solution of alum dissolve 100.0 grams of alum in 1.0 liter of water at 68F.
To use bleach prints in the bleacher until the image is only faintly visible. Then wash until all traces of yellow stain are removed. Then redevelop in the redeveloping solution until the image is completely redeveloped. Then wash thoroughly and dry. Prints on rough surface paper should be dried before bleaching. 

Ansco (Agfa) 221 Sepia Toner

Solution 1 (Bleach)
Water (at 125F or 52C)                    750.0 ml
Potassium ferricyanide                     50.0 grams
Potassium bromide                          10.0 grams
Sodium carbonate, monohydrated             20.0 grams
Water to make                               1.0 liter

Solution 2 (Redeveloper)
Sodium sulfide, desiccated                 45.0 grams
Water to make                             500.0 ml
For use as described below dilute 1 part solution 2 with 8 parts water.
Bleach in the bleaching solution until the image is converted to a very light brown color (should take about 1 minute). Then wash for about 10 to 15 minutes and redevelop in solution 2 (re-developer). Redevelopment should take about 1 minute. After toning prints should be washed for about 30 minutes. If the toner leaves sediment which results in finger marks or streaks on the print it should be immersed for a few seconds in a 3% solution of acetic acid after which a 10 minute wash is necessary. 
3% is about double the strength of a normal stop bath.

   These are what I have on hand at the moment.
I do not know what the purpose of the oxalate in the Kodak formula is for. 

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







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