Extravagatype and Na2

[Erich Camerling <e.camerling@freeler.nl>]

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