Re: Extravagatype and Na2

[Eric Neilsen <e.neilsen@worldnet.att.net>]

Where did you get your platinum salts?

EJ Neilsen


----- Original Message -----
From: "Erich Camerling" <e.camerling@freeler.nl>
To: "alt-photo" <alt-photo-process-l@sask.usask.ca>
Sent: Monday, May 06, 2002 7:35 AM
Subject: Extravagatype and Na2


> Richard Sullivan wrote in his APIS October 2000 article :"Sodium
> Chloroplatinate ( Na2PtCl6 , shortened  Na2 ) as a contrast agent in
> standard Pt/Pd printing " that Na2 can be used in Extravagatype (
> glycerinated developer with pure Pt )
> So I tried to do that.
> But when I mix ( for instance ) 3 drops Ammonium Ferric Oxalate ( 40g/100
ml
> H2O ) with 2 drops K2PtCl4 ( 20g/100 ml H2O ) and 1 drop Na2 ( 20g/100 ml
> H2O ) I immediately get a sediment ( yellow , I suppose K2PtCl6 ( nearly
> unsoluble ))
> Richard wrote me that I was the first who mentioned this problem.
> Other alt-photo-list members wrote about Na2 in PALLADIUM printing.
> Has anyone of this group tried Na2 in Extravagatype ? And what was the
> result ? I'm very interested.
>
> Erich
>
>