[LRFlex] Re: Confess my ignorance, what is chromogenic B&W?
- From: "Bille Xavier F." <hot_billexf@xxxxxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Fri, 15 Oct 2004 18:58:08 +0000
Steven
Your question is rather interesting, in fact, I spent a few hours at the
shop, chit chatting.
THe chromogeninc is a very old idea that came on the market some 20 years
ago. At that time there was the Agfa XXXX and the Ilford XP1. It was out of
fashion for a while until the XP2 made a come back (1992?)
Now, after years of Ilford XP2, the product has been discontinued. It was a
film with a lot of resolution power but the film support was weak, easily
scratched and the film had a red tone that made it a real headache to print
under the enlarger (I speak of experience).
Today, the T400CN has been put on the market and I've seen a sample of a new
product T400CN DW. The latest is aimed to the minilab. My friend and photog
tested the sample and the results are very warm, a bit unreal.
Chromogenic? The technology is roughly to put the B&W in layers of Red Green
Blue colors that would react to a given wavelength so the whole gives a grey
tone. I'm sure Kodak Site has a better explanation in chemistry.
The results for us user is that it's a C41 process film, like a Kodakolor
Gold 100. Cheap and probably quick. When printed on color paper, if the
machine is claibrated properly, it exhibits a Sepia Tone very pleasant. When
machine are not properly claibrated, it gives a colored sepia tone...
Today, I went to get one of the film T400CN left for dev. As it was not
there, the friend called FujiLab to trace that job. And we learned that
these are processed separately from the usual C41. Why? Probably because it
requires a calibrated machine. In my case, I requested a DEV only but it
went in the special tray....
Steve Barbour has recently presented some very well scanned photos of Paris
with the T400CN. In fact, the T400CN can go through the Nikon ICE (anti dust
anti scratches)) while a traditionnal B&W film cannot.
Just my 0.02 Camembert on the subject.
---------------------------------
Xavier F. BILLE
Maisons-Alfort - France.
From: "Steven Rosenthal" <steverose108@xxxxxxx>
Reply-To: leicareflex@xxxxxxxxxxxxx
To: <leicareflex@xxxxxxxxxxxxx>
Subject: [LRFlex] Confess my ignorance, what is chromogenic B&W?
Date: Fri, 15 Oct 2004 08:07:53 -0700
What is chromogenic B&W, is that the Tmax that is 'B&W' but uses standard
color lab processing ? or something else?
Steven
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