[pure-silver] Re: Food Grade Chemicals
- From: Marvin <marvbej@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 11 Jul 2013 13:11:51 -0400
I only use one food grade chemical, citric acid--for stop bath*)--because that
version is cheap and easy to find. I wouldn't hesitate to use any other food
grade chemical if the price was right, or if that was all I could find.
*Kodak SB-8 formula, 15 grams of Citric Acid and water to make 1 liter--because
I can't stand the smell of acidic acid.
On Jul 11, 2013, at 5:46 AM, Eric Nelson wrote:
> I've finally found ONE chemical supplier here that has some of the chemicals
> I need and use, but it turns out that they only supply "food grade"
> chemicals.
>
> Now this means that the prices can be cheap, which is good. While talking to
> them, I asked about their prices, which they don't list on their site.
> (http://www.ucs1986.com/chemical.htm) They asked me which chems I wanted, so
> quickly scanning the list online I figured Sodium metabisulfite would give me
> a good benchmark as to their prices. 1 kilo is 82 THB which equals $2.63.
>
> Score!
>
> Umm, Maybe!
>
> So my question is, how usable are food grade chemicals in photography? My
> guess is that with something like a metal salt (not sure what that would be
> doing in "food") in food grade might not be the best choice. This subject
> has been covered at length on this apug posting, but goes on ad nauseum
> (http://www.apug.org/forums/forum37/61248-food-grade-chemistry-ok-use-photography.html)
> and I'm hoping for a more concise discussion from personal experiences or
> 2nd hand experiences even. :)
>
> e
>
>
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