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Re: Ziatype problem

To: alt-photo-process-l@sask.usask.ca
Subject: Re: Ziatype problem
From: Don Bryant <dsbryant@telocity.com>
Date: Wed, 22 Aug 2001 22:45:05 -0400
Comments: "alt-photo-process mailing list"
References: <59.f0f5a3a.28b56c91@aol.com>
Reply-to: alt-photo-process-l@sask.usask.ca

Joe,



> 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.
>

How are you clearing your prints? I take it that the percipitate is  not
composed of small specks but more of a stain? Also what is the purpose of
the peroxide in your drop formula? Is the NA2 a 20% or 10% solution?

Don Bryant

Follow-Ups:
- Re: Ziatype problem
  - From: Eric Neilsen <e.neilsen@worldnet.att.net>

References:
- Ziatype problem
  - From: JoeSarff@aol.com

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