[alt-photo] Re: Copy film (Kodak 4125)

[Kevin Morris]

The Agfa Lith film is just that, lith film. It is, like you said to 
difficult to control the mid-tones.


-----Original Message----- 
From: Geoff Chaplin
Sent: Wednesday, October 27, 2010 8:25 PM
To: alt-photo-process-list at lists.altphotolist.org
Subject: [alt-photo] Re: Copy film (Kodak 4125)

What are your thoughts on Agfa Lith film? Gives the Dmax of 4 if that’s
what you need though the intermediate tones are difficult to control.
Available in 24" rolls.

Geoff Chaplin
チャップリン・ジェフ

geoff at geoffgallery.net
www.geoffgallery.net

Skype: geoffchaplin1611
UK mobile (英国の携帯電話): +44(0) 7770 787069
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-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Kevin Morris
Sent: Thursday, October 28, 2010 1:47 AM
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: Copy film (Kodak 4125)

It handles the production of our step wedges very well. We haven't found a
film as consistent since Kodak Commerical and Copy films were discontinued.
There are several good films that are useable but are as dependable.
Granted, the Dmax varies from emulsion to emulsion batch. There have been a
couple of years when getting a 4.0 optical density was next to impossible.


-----Original Message-----
From: etienne garbaux
Sent: Wednesday, October 27, 2010 12:39 PM
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: Copy film (Kodak 4125)

Kevin wrote:

>We have found that Ilford Ortho Plus is a very good replacement. It has
>a very manageable curve to work with, much like Kodak Copy film.

I do not share your enthusiasm for IOP.  While the contrast of IOP can be
adjusted via development, the range of adjustment is similar to any camera
film and far, far less than is possible with the double-emulsion 4125.
Also, with high-contrast development it shows a pronounced shoulder, which
precludes the sort of fine control of shadow and highlight densities 4125
made possible, and the D-Max falls short of what is necessary to make
negatives with good highlight separation at a DR suitable for pure Pt, salt
prints, etc.
(i.e., DR >2.3 or so).  It is also much faster than 4125, which makes it a
pain to work with in the darkroom.  T-Max 100 is actually much better in
every respect than IOP for copy use, although the panchromatic sensitizing
makes it that much more of a pain in the darkroom.  IOP is just an ordinary
medium-speed pictorial film that happens to be orthochromatic, which makes
handling easier in the darkroom.  It is not a real copy film in any sense.

Best regards,

etienne




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