Re: Film Speed and Negative Development (OT)

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From: Richard Knoppow (dickburk@ix.netcom.com)
Date: 04/09/03-05:11:13 PM Z

----- Original Message -----
From: "Phillip Murphy" <pmurf@bellsouth.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, April 08, 2003 7:23 PM
Subject: Re: Film Speed and Negative Development (OT)

> The off-the-shelf solution for increasing the appearance
of film speed
> without
> increasing contrast in the past has been with Acufine or
Diafine
> developers.
> ( I believe Crawley's FX developers are an attempt to
substitute those
> developers)
>
> One of the methods I've practiced successfully for truly
increasing
> certain film stock's
> effective sensitivity is with gas (Hypering)
hypersensitization. There
> is a range of
> methods and apparatus involved depending on the chemistry
and
> technique. Anyone interested
> in actually increasing film sensitivity can Google the
Astrophotography
> sites for information.
>
> It's questionable how practical this would be for someone.
Like owning
> a Noctilux lens. : )
>
> -Phillip
>
> Richard Knoppow wrote:
>
  Hypersensitizing does work but is mostly effective in
reducing the reciprocity effect of long exposures. Where
exposures of normal time are given it is less successful.
Details for hypering can be found on a couple of web sites
dedicated to astronomical photography. 

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com
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