[alt-photo] Re: potassium hexacholorplatinate?

[Marek Matusz]

Dan,

I am not sure about solubility of K2PtCl6, if my memory serves me it is low, but I do not have the reference handy. That is why Na2PtCL6 is used as a contrasting agent, it is very soluble. WIth the respect to chemical behaviour Na2PtCL6 and K2PtCL6 are very much alike. My suspition is that it would give very, very contrasty prints (solubility issue aside).

>From the chemistry standpoint it is a starting material in the preparation of proper platinum printing salt, K2PtCl4. As Loris noted all this because of different oxidation states of platinum. 
Marek 
> Date: Sat, 9 Jan 2010 19:17:27 +0200
> From: mail at loris.medici.name
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [alt-photo] Re: potassium hexacholorplatinate?
> 
> Hi Dan, K2PtCl6 is tetravalent (IV) whereas K2PtCl4 is divalent (II)
> and I'm pretty sure the valence plays a very important role in
> chemical reactions, therefore K2PtCl6 most probably won't behave as
> expected...
> 
> 2010/1/9 Dan Burkholder <fdanb at aol.com>:
> > Hi All,
> >
> > Is potassium hexacholorplatinate (K2PtCl6) suitable for platinum printing?
> > I've always used the Pot. Chloroplatinite (K2PtCl4) and have no idea what
> > the difference is. If I can use the former but it needs some different
> > mixing instructions, please clue me in.
> >
> > A kind person is offering to give me some of the "16" material but if it's
> > better for some other use, I'd like to steer his generosity in the right
> > direction.
> >
> > Many thanks for any and all info and tips!
> >
> > Dan
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