[alt-photo] Re: thiourea/thiourea dioxide

[Christina Anderson]

Yep, it's Judy's formulae that I want to try, to get paper to silver out with another chemical than chromo stuff.
Thanks, Dan, you're a gem!
Chris

Christina Z. Anderson
christinaZanderson.com

On Sep 10, 2011, at 4:47 PM, Daniel Williams wrote:

> Christina,
> 
> I bought Thiox (thiourea dioxide) at Pro Chemical & Dye http://www.prochemicalanddye.com/product.php?productid=16197&cat=0&page=1.  This is a company that specializes in chemicals and dyes for people working with fibers and fabrics.  Unless you are planning on doing a lot of toning with this, I would recommend buying the 8 ounce minimum quantity.  A little goes a long way and, over time, the dry chemical goes bad.  The powder changes from white to yellowish.  I haven't used mine in a couple of years and I see mine has changed.
> 
> If you have Tim's book, I highly recommend reading his article on FSA.  If I recall correctly, Judy had an article in Post-Factory also.
> 
> Dan Williams
> Enumclaw WA
> 
> On 9/10/2011 2:22 PM, Christina Anderson wrote:
>> 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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> 
> 
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