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Re: Scanning Pyro Negs?

2006-03-29 by scott_now_coming

I just loaded some Delta 3200 in my Rollei. I'll shoot it in the next 
couple of days and the develope it in Pyro TEA.

Unfortunately, I won't have the new Epson scanner for a while as 
Epson isn't yet accepting "pre-orders" for the V-750. :>(

Anyone using Pyro TEA?

Scott

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Clayton Price 
<clay@...> wrote:
>
> 
> Hi All -
> I'm a little late to this discussion but perhaps can add a little 
to 
> what Juraj has written.
> Many years ago I was mixing Pyro formula from scratch but found 
that  
> PMK worked at least as well,
> and came partially pre-mixed.  I used it for all my fine art 
negatives 
> - 4X5, but mostly 120 and
> 35mm.  I love the staining of the shadow areas, which allows for 
much 
> better control of the highlights
> without burning out shadows. Additionally, there's something in the 
> formula that slows the silver particles
> from migrating into adjacent areas with less density.  I don't 
remember 
> the technical explanation, but the
> net result is sharper delineation.  Depending on the subject and 
the 
> light, there can be a dramatic
> improvement in prints.
> 
> So 5 or 6 years ago, I started scanning some of those negatives, 
and 
> the results were terrific. Because the
> stain is greenish. brownish, yellowish :-), my best results have 
been 
> scanning in RGB and as Jurj has mentioned, converting
> to grayscale via channel mixing in Photo Shop. My logic for this is 
> that the green channel controls much of
> the shadow detail you want to show through (since most of the stain 
is 
> in shadow areas).  Also, one
> would have to scan the negative as if it were a transparency - 
i.e.: 
> the scan comes up as a negative.
> Only after working on it in channel mixer should it be inverted to 
> positive. That will take some experimenting
> because it's so difficult to make tonal judgments looking at a 
negative 
> image, but IMO it's worth the trouble.
> 
> As far as grain is concerned - I think there may be a little more 
grain 
> with PMK developers, but personally, I like
> grain most of the time and never thought of it as a problem.
> 
> On Mar 28, 2006, at 4:40 PM, 
> DigitalBlackandWhiteThePrint@yahoogroups.com wrote:
> 
> >
> > Message: 2
> >    Date: Tue, 28 Mar 2006 16:34:56 -0000
> >    From: "jurajlipscher" <juraj@...>
> > Subject: Re: Scanning Pyro Negs?
> >
> > Hi Jules & Martin
> >
> > 1. There is a fairly extensive article on scanning pyro negatives 
and
> > selectively using different color channels in the magazine 'Ag' 
No.
> > 26. Here is their webpage with the possibility to order back 
numbers:
> > http://www.ag-photo.co.uk/
> >
> > 2. I have been working with PMK for the last 15 years and am 
presently
> > also using Pyrocat HD. I scan both kinds of negatives either with
> > EPSON 4990/Vue Scan or IMACON 646 and have beautiful results with 
both
> > developers and both scanners.
> >
> > On and off I am poring over the following question which is 
directly
> > pertinent to this list:
> >
> > Enlarging pyro negs (PMK and/or Pyrocat) on multigrade silver 
paper
> > gives you the advantage of the yellow/brown stain selectively 
holding
> > back the hard blue light of the enlarger so that the highlights be
> > selectively filtered down by the stain and thus giving better
> > differentiation in the highlights. This has been described in 
depth by
> >  Gordon Hutchings (inventor of PMK) and also by Sandy King 
(inventor
> > of Pyrocat).
> >
> > Now what I would like to work out is how to achieve similiar 
increase
> > of differentiation of highlights in scanned pyro negatives. This 
would
> > have to entail scanning the pyro negs in colour and then 
simulating
> > the selective filtering by intelligent use of the channel mixer or
> > some such in Photoshop.
> >
> > Has anyone any ideas in this direction or does anyone know someone
> > with such ideas? ;-)
> >
> > best regards
> > Juraj
>

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