[pure-silver] Re: Chromogenic toning?
- From: "Don Feinberg" <ducque@xxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 21 Jan 2005 14:50:32 -0600
I've found it impossible in the last few months to get CD-3. Only CD-4
seems to be available. Some advice given to me was to substitute CD-4 in
CD-3 recipes using half quantity.
Does anyone have anything more substansive?
Thanks.
Don Feinberg
ducque@xxxxxxxxxxxxxx
>
> >
> > Color Developer
> >
> > Kodak CD-1 .............................. 2.5 g
> > Sodium sulfite (anhy) ................... 2.5 g
> > Sodium carbonate (anhy) ................. 15.0 g
> > Potassium thiocyanate, 10% .............. 10.0 ml
> > Color coupler ........................... 5.0 ml
> > Water to make ........................... 1.0 l
> >
> > The developer can be made up beforehand and should keep for about a
month.
> > The coupler should be added immediately before use.
> >
> > The print is bleached in any rehalogenizing bleach and redeveloped in
the
> > above color
> > developer. After development the print should be bleached again and
fixed.
> >
> > Encyclopedia of Photography, Focal Press 1962.
> >
> > The resulting prints are essentially color prints and like them must be
> > protected from exposure to direct sunlight. You could use any of the
other
> > color developing agents CD-2, CD-3, CD-4.
> >
> > You could also probably use the developer from the Kodak RA-4 color
print
> > process by adding the coupling agent just before use. You would have to
> > experiment.
> >
> > This technology is essentially what was used in the old Kodachrome
process.
>
>
> I've got CD-4 in the house so that's okay. Would using sodium thiocyanate
> cause problems? The cost is about 1/4 the potassium.
>
> Looks like I'd just have to find the colour couplers.
>
> Thanks this looks much more do able.
>
> Nick
>
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