[Alt-photo] Re: Food Grade Chemicals

[Mustafa Umut Sarac]

Lab Grade Erythrosine from Sigma : 1 grams 600 dollars
Erythrosine from alibaba.com         : 1 grams 30 cents

You can pay 2000 times more money , I cant.

Umut



On Thu, Jul 11, 2013 at 6:41 PM, eric nelson <emanphoto at gmail.com> wrote:

> That's exactly what I was thinking too Bob.
> Thanks
> to
> all
> for the reassurance!
>
>
>
> On Thu, Jul 11, 2013 at 10:30 PM, BOB KISS <bobkiss at caribsurf.com> wrote:
>
> > DEAR ERIC,
> >         Many moons have passed, Kimosabe, since my father worked for
> Merck
> > and Co...somewhere around the late 30s and then he was a pharmacist's
> mate
> > on ships in the Merchant Marines during WW II.  But he taught me at the
> > very
> > beginning of my photographic endeavors (around 12 years old) that
> > Photographic Grade chemicals were well below Food Grade in purity and
> only
> > slightly better than Technical Grade.  Now this was half a century ago
> so I
> > don't know if either the grading system has changed or my memory serves
> me
> > properly.  The only time I would truly care about better than food grade
> > (Lab or Reagent grade) would be with very expensive metal salts (silver,
> > gold, platinum, palladium) and other reagents in their respective
> > processes.
> > Other than that you should be fine.
> >                         CHEERS!
> >                                 BOB
> >
> > -----Original Message-----
> > From: alt-photo-process-list-bounces at lists.altphotolist.org
> > [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf
> > Of
> > eric nelson
> > Sent: Thursday, July 11, 2013 7:26 AM
> > To: alt-photo-process-list at lists.altphotolist.org
> > Subject: [Alt-photo] Food Grade Chemicals
> >
> > This is a cross post so sorry if you've getting it again.
> >
> > 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-photogr
> > aphy.html<
> 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
> >
> > --
> > Eric Nelson Photography
> > 086 343 1612
> > http://ericnelsonphoto.tumblr.com/
> > https://www.facebook.com/EricNelsonPhotographyBangkok
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>
>
> --
> Eric Nelson Photography
> 086 343 1612
> http://ericnelsonphoto.tumblr.com/
> https://www.facebook.com/EricNelsonPhotographyBangkok
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