[pure-silver] Re: Chromogenic toning?
- From: Nick Zentena <zentena@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 21 Jan 2005 21:35:08 -0500
On January 21, 2005 09:03 pm, Richard Knoppow wrote:
>
> I have a _very_ high regard for Tim Rudman but he is
> wrong about this. I think he is confusing _tinting_ with
> toning. Tinting if done by staining either the gelatin or
> the support and is as described. Dye _toning_ is done by
> converting the silver to a substance which acts as a mordant
> for the dye. It is then removed by fixing leaving the dye
> image in the gelatin. If done right neither the gelatin
> itself or the support is dyed. The whole idea of a mordant
> is that the dye sticks to it in preference to the genatin in
> which it is embedded.
It's very likely I screwed up so lets not blame anybody but me-) The quote I
gave was for gelatine dyes. I guess the process your mentioning is covered
under dye mordanting processes.
Nick
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