[pure-silver] Re: Sepia Toners

I have that same "T-7a" formula or whatever it was
called in my books, and used it many years ago, but
stopped making it because of the oxalate toxicity.  

Can't comment on the look as that was a while ago.

Eric

--- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:

> 
> ----- 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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