Re: Sources for wet plate collodion chemicals

From: Etienne Garbaux <photographeur@softhome.net>
Subject: Re: Sources for wet plate collodion chemicals
Date: Mon, 29 Aug 2005 01:08:12 -0400

> The "new tintype" kits that use liquid silver-gelatin emulsion do not
> produce the finely-divided, whitish-looking silver deposits that the wet
> collodion processes produce. Accordingly, the best that can be hoped for
> is a rather dull simulation of a real tintype. Unfortunately, there is no
> good way to persuade these S-G emulsions to produce good, whitish silver
> deposits.

One of recent directions of silver gelatin research is to make AgX
crystals of nanometer scale for holography and other applications. The
techniques used in preparing such emulsions are similar to
conventional negative emulsions, but the precipitation is often
carried out in presence of fish gelatin.

If filamentous morphology of developed silver is undesirable, a
physical developer should be used.
Received on Mon Aug 29 02:43:10 2005