[pure-silver] Re: Personal Dev Times
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 12 Apr 2006 10:03:04 -0400
Thanks for the information.
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Richard Knoppow
Sent: Tuesday, April 11, 2006 7:18 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Personal Dev Times
----- Original Message -----
From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, April 11, 2006 9:41 AM
Subject: [pure-silver] Re: Personal Dev Times
I believe that Verichrome Pan was double layer and it goes
back to 1956.
I don't know if the older Verichrome was double coated. It
was
introduced in 1931.
Jerry
AFAIK, the original Verichrome, and practically all
negative films of the time were double coated. This, as
Ryuji states, was done to control the curve shape and extend
latitude.
The advantage of thin emulsion films is that there is less
spreading of the image due to scattering (irradiation) in
the emulsion.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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