argentotype

To: Alt-Photo Mailing List <alt-photo-process-L@usask.ca>
Subject: argentotype
From: Alberto Novo <alt.list@albertonovo.it>
Date: Mon, 11 May 2009 12:29:44 +0200
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I am writing a short article on VanDyke brown print for a school, and referring to the earlier Herschel's argentotype would be fine. I have not any details on this technique, only that it was a Fe am citrate coating developed in silver nitrate. I have a Namias' formula for a brown-black callitype developed in alkaline silver nitrate which might be a more refined approach, but I would prefer to find the original formulation.
Anybody has that complete formulation and a bibliographic reference?
Alberto

Follow-Ups:
- Re: argentotype
  - From: david drake <daviddrakephoto@sympatico.ca>