Little white spots and static electricity

["Peter Badcock"<pbadcock@xxxxxxxxxxxxxxx>]

This is an interesting theory Angela.  Static electricity can be generated by 
friction between two bodies.  Eg. the Film(polyester) and the changing bag.  Or 
the film and the (plastic)take-up spool.  And the amount will depend on a few 
factors too, such as : how humid the surrounding environment is (ironically DRY 
is worse than wet), what the two bodies are made from, and how fast they are 
rubbed together.

A static electricity discharge, onto the film, even too small to hear could 
easily do damage to the film's surface.  If you need to know how much the 
environment may be prone to static , take off a sweater inside in a room with 
all the lights off, and if it's dry enough then watch/hear those sparks fly.

what do others think?

regards
Peter B

______________________________ Reply Separator _________________________________
Subject: Re: Sprocket shadows & little white spots
Author:  <infrared@xxxxx> at INTERNET
Date:    09/4/98 4:17


I have since read something in "Darkroom Dynamics" that talks about 
that same effect from static electricity.  Has anyone had any 
experience with static electricity and infrared?  I thought that would 
only be a problem in cold weather with a motor drive, but . . .

Angela
aeophoto@xxxxxxxxxxx


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