Re: [Rollei] OT: Odourless Sepia Toner

[Richard Knoppow <dickburk >]

At 10:41 AM 06/14/2002 +091800, you wrote:
>
>> After a lot of work with Sepia toners, Richard i finally discovered
>> Selenium toner in the late 70's which has a very very faint ammonia odor
>> which i don't mind.
>> As a matter of fact i like it.
><snip>
>
>Mark,
>
>Thanks for the reply, but I am looking at Sepia toning because
>I want the brownish toning.  I am thinking about the odourless
>sepia toners vs. traditional sepia mainly due to the better 
>health + environmental issues.  However I am concerned that 
>the variable toning may leave silver bromide in the print.  This 
>would of course dramatically reduce print life, in effect it 
>becomes a poorly fixed print.  None of the commercial odourless
>toners mention fixing after toning.  So I just want to know
>if people have had problems with print life after using the odourless
>toner.
>
>
>Richard
>---
>Richard Urmonas
>
   A number of low odor Sepia toners use Thiocarbamide (Thiourea) in place
of Sodium Sulfide. By variations in both bleach and redeveloper a range of
tones can be gotten. Since the toned image is composed of Silver Sulfide it
is very permanent. 
  The following is an example. Varigam was one of the first variable
contrast papers, a neutral-black paper.

Defender Varigam Toner

Bleach B-1
Water					500.0 ml
Potassium Ferricyanide		 22.0 grams
Potassium Bromide			 25.0 grams
Water to make			  1.0 liter


Bleach B-2
Water					500.0 ml
Potassium Ferricyanide	       22.0 grams
Postassium Iodide			 10.0 grams
Water to make 			  1.0 liter


Bleach B-3
Water	q				500.0 ml
Potassium Ferricyanide		 22.0 grams
Sodium Chloride			 35.0 grams
Nitric Acid				 15.0 ml
Water to make 			  1.0 liter


  After fixing and thorough washing prints are bleached in one of the above
bleaches for twice the time necessary to visually convert the silver image.
They should then be washed until there is no sign of the yellow stain from
the Ferricyanide. 
  The print is then re-developed in one of the following toning baths.

Toner T-1
Water					500.0 ml
Thiocarbamide			  3.0 grams
Sodium Hydroxide			  6.0 grams
Water to make			  1.0 liter


Toner T-2
Water					500.0 ml
Thiocarbamide			  3.0 grams
Sodium Carbonate			 45.0 grams
Water to make			  1.0 liter


Toner T-3
Water					500.0 ml
Thiocarbamide			  3.0 grams
Potassium Carbonate		 48.0 grams
Water to make 			  1.0 grams


Bleach	Toner			
B-3		T-1		Deep Brown, to purplish
B-2		T-1		Deep Brown 
B-1		T-3		Yellower Brown
B-1		T-3		Yellow Brown
B-3		T-3		Very Yellow Brown, "Sunlight effect"

T-2 used in place of T-3 gives slightly colder tones. 
	

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

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