Steve Shapiro (sgshiya@redshift.com)
Sun, 21 Mar 1999 10:06:57 -0800
Go for it.
s
-----Original Message-----
From: Michael Keller <keller@wvinter.net>
To: alt-photo-process-l@skyway.usask.ca
<alt-photo-process-l@skyway.usask.ca>
Date: Sunday, March 21, 1999 9:32 AM
Subject: Re: Film Development tubes and Negative Streaking
>Steve Shapiro wrote:
>
>> Never shake like a coctail. Agitation is a gentle motion for film
>> developing.
>
>I can't speak for large format shaking, but a test done in Darkroom
Techniques
>magazine some years back, comparing Patterson plastic tanks vs stainless
steel
>and focusing on even development, showed that vigorous, random agitation
gave
>the most even development. The Patterson tanks with the funnel-like lid
that
>creates a large airspace, gave even development thanks to the fact that,
>during inversion, the developer dumps into that holding area and creates a
big
>volume of air to rise up through the developer. The second best method was
>using a stainless steel tank and putting an empty reel in the top, thus
>creating a similar airspace. The same test showed that vigorous agitation
was
>better than gentle inversions. I recall Ansel Adams touting the "torus"
>inversion, where you inverted and gave a twist to the wrist at the same
time.
>
>I don't shake like a cocktail, but there's nothing gentle about my
inversions
>using the P tanks on small and medium format films. The only time I shake
like
>a cocktail is per Kodak's instructions on Tech Pan developed in Technidol
>liquid.
>
>
This archive was generated by hypermail 2.0b3 on Sat Nov 06 1999 - 10:09:04