Re: Thomas Duplex Sodium Vapor Safelight

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From: Tom Ferguson (tomf2468@pipeline.com)
Date: 04/06/03-02:41:55 PM Z


I'll second Philip's suggest of pre exposing your "safelight" test paper
and Judy's suggestion that regular bulbs rather than silver gelatin
"safelights" are typically the best for us "alt" folks. You can read my
alt safelight article here:
http://www.pipeline.com/~tomf2468/safelight.html

On Sunday, April 6, 2003, at 01:19 PM, Jack Fulton wrote:

>
>
> Something to keep in mind when doing a coin test for "safe" lights, be
> sure that you "flash" the paper or film first to the
> inertia point of the material before beginning the coin test. Leaving
> this step out  is a common mistake.
>
> -Phillip
>
> Phillip . . . this is interesting. I can see one doing this but don't
> quite see the need to do so. Yes, to 'trigger off' the theoretically
> 'edge' of what constitutes an exposure to create density could propel
> or initiate a more sensitive reaction to a worn out or incorrect
> safe-light. But why do you say this is necessary?
> Jack
>
>
--------------
Tom Ferguson
http://www.ferguson-photo-design.com


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