[pure-silver] Re: Toning formulas
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 25 Apr 2006 08:26:51 -0700
----- Original Message -----
From: "Jim MacKenzie" <jim@xxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, April 25, 2006 8:10 AM
Subject: [pure-silver] Toning formulas
----- Original Message -----
From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, April 24, 2006 5:13 PM
Subject: [pure-silver] Re: Rodinal in Montreal
Kodak Brown Toner is similar to "new" Viradon. The
original Viradon was a combination toner with Polysulfide
and Selenium, Kodak Polytoner was similar. Both companies
discontinued the combination toner a couple of years ago.
Agfa coninued to make Viradon but as a Polysulfide only
toner.
Thanks for posting the formula. I recently got some
silver sulfide so that I could make a sepia toner from a
formula that I have (I think it's an Agfa formula; I can
look it up if desired). It uses potassium ferricyanice as
the bleach. The only chemical that wasn't in my darkroom
was the silver sulfide so I'm ready to go.
Are these liver of sulfur formulae better, worse,
different ... ? I'm a bit of a toning newbie.
Jim
_Silver_ sulfide, do you perhaps mean Sodium sulfide?
Bleach and redevelop sepia toners use either sodium sulfide
or thiocarbamide as the redeveloper.
As far as Polysulfide toners I think there is little
difference. A solution of plain liver of sulfur in water
will work. The Image Permanence Institute has a Liver of
Sulfur formula using Borax devised for toning microfilm
which uses Borax and is supposed to be low odor. As long as
KBT is available I suspect its not worth mixing your own.
Bleach and redevelop toners, also called indirect
toners, are best on cold or neutral tone papers because they
tend to produce a yellowish brown. The color of the toned
image depends on the color of the original silver image and
to some degree on the developer. Single bath toners, also
called direct toners, generally produce colder tones, more
suitable for warm tone paper. KBT and my combination toner
may produce very little color shift on some cold or neutral
tone paper. There is no sure way of predicting this, one has
to try.
There are a great many toner formulas. Those published
by Kodak and Agfa/Ansco seem to be reliable. There are good
formulas from other sources also but those from very old
books may not work as advertised.
Tim Rudman is the expert on toning. His book _The
Photographer's Master Printing Course_ contains an excellent
section on toning and I beleive he has a book dedicated to
toning.
Prints toned in sepia toners are very resistant to
degradation.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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