From: Richard Knoppow (dickburk@ix.netcom.com)
Date: 09/26/02-04:50:43 PM Z
----- Original Message -----
From: "James Young" <jamiehy@globaldialog.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Thursday, September 26, 2002 6:10 PM
Subject: Re: demise of tri-x 8x10?
> The only way to really find out is call Kodak professional
products
> division- What used to be ext 19 (maybe it still is). A
lot of things
> aren't in the catalog, and half the time things change so
fast that
> no one knows what's happening. Also if the dealer can't
give a
> catalog # then they may think it's discontinued when it's
not- so
> call kodak and find out, and write down the catalog #.
jamie Young
In the USA its 1800 242 2424 ex. 19
Kodak has moved B&W film production to a new plant. They
discontinued some films and are calling the remaining ones
by slightly different names. There are some changes in the
emulsions, probably slight.
Tri-X Roll film and Tri-X sheet film are being continued.
Plus-X Roll film is continued, Plus-X sheet film is being
discontinued. Further info is on the Kodak web site.
There are new data sheets for the films being continued
with slightly modified developing recommendations.
Both Plus-X and Tri-X brands were used for two quite
different emulsions, one for the roll and 35mm film, another
for sheet film.
Plus-X Pan, Tri-X Pan, and Ektapan (also discontinued)
sheet films have curves which are upward deflected
everywhere. In other words the contrast increases
continuously with density. The result is to produce very
brilliant highlights with somewhat suppressed mid-tones.
This is desirable for some subjects but is not a good
characteristic for general photography.
The roll and 35mm versions of these films have a
conventional medium toe characteristic.
T-Max sheet films have a rather short toe and long
straight line characteristic. These films are more suitable
for self-masking printing processes, like POP and Platinum,
which tend to lower the contrast of the shadows.
Ilford FP-4, HP-5, and Agfa films are all medium toe films
with a considerable straight line characteristic. By rating
them a bit below the ISO speed the shadow exposure is pushed
up to out of the toe and its contrast increased.
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