[alt-photo] Re: thiourea/thiourea dioxide

[Christina Anderson]

Thanks, Dan, I thought this might be the case unfortunately, as I have a bunch of thiocarbamide.... Where did you get it from in the States? I don't see it listed at Artcraft or Photoformulary or Bostick and Sullivan..

Christina Z. Anderson
christinaZanderson.com

On Sep 10, 2011, at 3:00 PM, Daniel Williams wrote:

> On 9/10/2011 12:49 PM, Christina Anderson wrote:
>> Anyone know the difference between thiourea/thiocarbamide and thiourea dioxide, and are they at all interchangeable in photographic processes/toning?
>> 
>> Christina Z. Anderson
>> christinaZanderson.com
>> 
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>> 
> Christina,
> They are different and produce distinctly different results.
> 
> Thiourea/thiocarbamide - different names for same thing - is an "odorless" sepia toner.
> 
> Thiourea dioxide is different and is also called FSA (formamidine sulphinic acid and is also known as Manotone toning. As if it needed still more names, the supplier I bought it from calls it Thiox.
> 
> Tim Rudman has articles on both these toners is his toning book.
> 
> Dan Williams
> Enumclaw WA
> 
> 
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