Re: Ziatype problem

[Jason Plunkett <jrplunkett1@home.com>]

I too get the same ppt. when using Sodium Chloroplatinate with ziatypes.
For a 5x7 print I use (for example) 8 Oxalate, 7 palladium, 1 Sodium
Chloroplatinate.  I have found that the ppt does have a negative effect on
the print escpecially at higher concentrations of Sodium Chloroplatinate.
I end up having to blot off the ppt after I'm done rodding on the coating,
which sometimes leaves an unsightly light spot on the border edges.  I've
not discovered (or heard of) a fix for the ppt.

Jason Plunkett
----- Original Message -----
From: <JoeSarff@aol.com>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: Wednesday, August 22, 2001 3:14 PM
Subject: Ziatype problem


> I have been making Ziatype prints for a few months.
>
> Lately (in the last week or so) I have noticed an orange precipitate when
I
> add Sodium Chloroplatinate as a contrast agent.
>
> Does anyone have a guess what is happening?
>
> The mix I use is 6 Ammonium Ferric Oxalate, 4 Lithium palladium chloride,
1
> gold chloride, 1 Sodium Chloroplatinate, 1 hydrogen peroxide.
>
> Thanks.
>
> Joe