RE: platinic acid as contrast agent

Rajul, Platinic Acid has the same formula as the Na2 contrast agent with
the exception that H is used in place of Na; both being +1. Yes, it does
work with PD only and getting a hold of Engelhard is simple. They are in
both Europe and the US. I deal the office in Seneca, SC and with Rick
Clayton in particular. You should know that before you call, they are NOT
in the business of making platinum/palladium prints or other alternative
prints. They sell refined metal products or which platinum, palladium and
gold are of keen interest to me. I reach Rick at 1 800-336-8559 ext 4.

I don't have the product code in front of me, but if you ask for platinic
acid that should work.

There may be a slight change in properties from Platinic Acid as the much
talked about Na2 but I didn't see enough to me not try it. It is listed in
Nadeau's book on platinum printing as an ingredient in a toner. That toner
also works although it is somewhat pH dependant so some printers have better
success than others. The Sodium formate is hydroscopic and will change
weight if not carefully handled.

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

> -----Original Message-----
> From: Rajul Iyer [mailto:eyeear@direct.ca]
> Sent: Sunday, December 21, 2003 4:29 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: platinic acid as contrast agent
>
> Eric,
>
> I reread your observations w the above in respect to Pt/Pd blends
> communicated on Dec. 5, 2003. I am curious about its having "quite an
> effect". My questions:
>
> Does it work with Pd alone?
> If so, how does it compare with Sodium chloroplatinate (Na2)?
> How can one reach Engelhard?
>
> Thank you for your help. Rajul
Received on Sun Dec 21 20:40:35 2003