From: Judy Seigel (jseigel@panix.com)
Date: 05/30/01-04:54:32 PM Z
On Wed, 30 May 2001, Richard Sullivan FRPS wrote:
> Any good inorganic synthesis book (check out Bauer) will give you the
> procedures. It is not however a thing to be done on your kitchen stove with
> the windows open as was previously cited for making gold chloride in an
> alt-photo journal known in these parts.
Richard, your nose should be so long by now you can't see yourself in the
mirror to shave...
> ..Kids, don't try this at home!
And kids.... that's a totally effective disclaimer and we're sure nobody
will have any problems or do anything dangerous and if they do.... see
above. It also seems that some folks are so talented they can talk out of
both sides of their mouth at the same time even if they CAN'T see in the
mirror! In sum, this message is insulting not just to the intended
recipient(s) but to the intelligence of anyone reading it. Richard, do you
INSIST on war????
Judy
> Platinum is many times slower to go into solution than is gold so a lot
> more heat is needed. Hot aqua regia is nothing to play with unless you know
> what you are doing.
> The steps:
>
> Dissolve the Pt in hot aqua regia. The gasses released are deadly!
>
> Remove the oxidizing nitric acid from the AR by chasing with hydrochloric acid.
>
> Add pot chloride to make K2PtCl6 and insoluble yellow precipitate
>
> Reduce the K2ptCl6 to K2PtCl4 with hydrazine di-hydrachloride (more nasty
> stuff!)
>
> Dry in the normal manner.
>
> It's pretty simple till you try to do it.
>
> There is a ton of gotcha's along the way and after 25 years of making it we
> still run into a pound or so of them. None of the synthesis books explain
> the gotcha's. Like cooking, it is an art. The books give a recipe but you
> need some experience to make it happen right. I no longer make stuff as my
> son Dana (here in Santa Fe we are casually known as Bostick & Sullivan y
> Familia) runs the lab.
>
> We run all our hot gases out of 4 liter vacuum flasks through water
> aspirators run on pumps through 50 gallon tanks of concentrated sodium
> carbonate. The gases are neutralized into small amounts of CO2, sodium
> nitrate and sodium chloride.
>
> My first attempts years ago involved using an industrial fan to blow it up
> a 10 foot stack made out of plywood. The fan blade dissolved in about 2
> hours. Literally! The motor bearings were sealed and lasted. When the first
> blade fell off it started shaking the whole place violently and spilled
> $500.00 dollars worth of Pt solution in a beaker to the floor due to the
> shaking. None of this part of the process was explained in the synthesis
> book. There are special fans made out of Teflon which are used for aqua
> regia fumes as you cannot use an ordinary lab fume hood. The special fans
> cost big bucks and then you still have the problem of where are you going
> to blow the fumes.
>
> Just thought a few folks here like Bob Schramm might find it interesting or
> maybe just wondering why I might still be alive. I am too.
>
> Dick Sullivan FRPS
>
> And yes that is Fellow of the Royal Photographic Society. The first and
> oldest photographic society in the world. I am proud to be a Fellow and in
> the company of William Henry Fox Talbot, Edwin Land, and many others, but
> lest anyone think otherwise, I do not dare to compare myself to such giants.
>
>
>
>
>
>
>
>
> > >From: Sandy King
> > >Reply-To: alt-photo-process-l@sask.usask.ca
> > >To: alt-photo-process-l@sask.usask.ca
> > >Subject: Platinum Stuff
> > >Date: Tue, 29 May 2001 03:35:35 +0100
> > >
> > >
> > >I need some platinum for toning of POP and silver/iron prints. In
> > >the
> > >past I have used something called Platinum Solution #3, Platinum
> > >Chloroplatinite (spelling?). How does one prepare this solution from
> > >the metal itself, and is there any practical advantage to doing so?
> > >
> > >Sandy King
> > >
> >
> >
> >----------
> >Get your FREE download of MSN Explorer at
> ><http://explorer.msn.com>http://explorer.msn.com
>
>
>
>
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