[pure-silver] Re: Agfa Paper Equivalent
- From: Bogdan Karasek <bkarasek@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 10 Jun 2008 22:21:36 -0400
Thank you, Richard.
Bogdan
Richard Knoppow wrote:
----- Original Message ----- From: "Bogdan Karasek"
<bkarasek@xxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, June 09, 2008 8:48 PM
Subject: [pure-silver] Re: Agfa Paper Equivalent
WOW!
Thank you, Richard, that was a great little jewel of photo history!
So Tri-X jumped from 200asa to 400asa, or was it around then? On
that same item, when did XX morph into Tri-X?
Cheers,
Bogdan
I didn't read this carefully enough the first time. Super-XX
predates Tri-X. Both were made simultaneously for many years. Kodak
made three general purpose films for both still and motion picture
use: Plus-X at about ISO 125, Super-XX at about ISO-200m, and Tri-X at
ISO-400. In addition they made Panatomic-X, a very fine grain film, at
about ISO-50. There was a Panatomic film before Panatomic-X, I think a
bit slower. Both evolved from a motion picture stock called
Background-X, a slow, fine grain film, intended for making background
plates for rear projection and for other special effects uses. It was
also widely used for exterior work where there was plenty of light. I
think its speed would have been about ISO-25, maybe a bit less.
Previous to Plus-X, which dates from about 1940, Kodak made a motion
picture stock called Super-Sensitive Pan or SS-Pan, somewhat slower
than Plus-X.
I don't have complete film lists earlier than the early 1940's but
Kodak, AGFA, and Dupont advertised their films widely. I have a lot of
back issues of a magazine published by the camera union in the 1930s
and 40s. The advertising there gives some idea of the films available
and the time line for them. Dupont called its stock "Superior", Kodak
advertised SS-Pan with the slogan "NO Superior".
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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--
________________________________________________________________
Bogdan Karasek
Montréal, Québec bogdan(at)bogdanphoto.com
Canada www.bogdanphoto.com
"I bear witness"
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