RE: Trivia time: room temperature solubility of platinic acid

Clay, This is what I had on hand when all the Na2 introduction was being
pushed. I looked it up and the platinic acid substitutes H for Na. I mixed
it as 20% down from I think 50%. I had it on hand to use as a toner for
platinum prints. It works fine. In fact I can see no reason why it wouldn't
work as well or better than Na2. Better? More neutral. Na has a tendency to
warm up palladium prints, so I'd expect the elimination of it to reduce the
warmth of your print.

Can you comment on it? You should be able to buy Platinic Acid from
Engelhard as I did.

Eric Neilsen Photography
4101 Commerce Street
Suite 9
Dallas, TX 75226
http://e.neilsen.home.att.net
http://ericneilsenphotography.com
 

> -----Original Message-----
> From: Clay [mailto:wcharmon@wt.net]
> Sent: Monday, December 05, 2005 6:45 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: Trivia time: room temperature solubility of platinic acid
>
> Thanks! I'm going to probably mix it up at 20% like the Na2 salt.
>
>
> Clay
> On Dec 5, 2005, at 11:58 AM, Marek Matusz wrote:
>
> > CLay,
> > I did not see that you got an answer. I checked two books for
> > properties, both list H2PtCl6 as soluble, no number given. If
> > memory serves me, this stuff is very soluble and you should have no
> > problem making say 10 or 20% solution.
> > Marek
> >
> >
> >> From: Clay <wcharmon@wt.net>
> >> Reply-To: alt-photo-process-l@sask.usask.ca
> >> To: alt-photo-process-l@sask.usask.ca
> >> Subject: Trivia time: room temperature solubility of platinic acid
> >> Date: Fri, 02 Dec 2005 17:59:02 -0600
> >>
> >> Anyone know the answer to this? I'm going try a small amount of
> >> this stuff out as a contrast control agent, and am looking for
> >> number for mixing my stock solution.
> >>
> >>
> >> Thanks!
> >>
> >> Clay
> >
> >
Received on Thu Dec 8 17:18:41 2005