Re: Thomas Duplex Sodium Vapor Safelight

About this list Date view Thread view Subject view Author view

From: Jack Fulton (jefulton1@attbi.com)
Date: 04/06/03-02:19:49 PM Z


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


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2.1.5 : 05/01/03-11:59:54 AM Z CST