[pure-silver] Re: Any advice for purchase of densitometer.
- From: john stockdale <j.sto@xxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 23 Dec 2004 23:12:45 +1000
With 'hard' filtration, pyro stain just acts as density.
With mixed hard + soft light, the pyro stain will pass (some) green which
will soften highlights.
In "Edge of Darkness" Barry Thornton shows an example of pyro (pyrogallol)
stain leading to dull highlights with VC paper. The effect varies with
paper type.
If you had a soft neg that required hard filtration, the effect would be less.
Pyrocatechol gives a stain colour which does this less, being more brown
rather than sort of olive green or khaki.
John Stockdale
============================
At 09:51 PM 23/12/2004, you wrote:
>Will the stain shift the highlight contrast towards 'soft'. I prefer more
>highlight separation and burn highlights with 'hard' filtration. Would a
>pro (pyro)
>negative lead to the opposite effect?
>
>
>
>
>
>Regards
>
>
>
>Ralph W. Lambrecht
>
>
>
>
>On 12/23/04 10:37 AM, "RH Designs" <richard@xxxxxxxxxxxxxxx> wrote:
>
> > In case of a stained negative the resulting filter is
> > different from the enlarger filter. I.e. both filter values are changed.
> > Also the stain is more colourful in the highlights (darker parts of the
> > neg.), compared to the shadows. This fact leads on one side to the
> > wonderful highlight details, that are one of the main reasons for using
> > pyro.
>
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