[alt-photo] Re: thiourea/thiourea dioxide

[Daniel Williams]

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
>>>
>>> _______________________________________________
>>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>>
>>>
>> 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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>