"Neuman - Ruether" wrote in message
news:3e0e2b75.20384870@newsstand.cit.cornell.edu...

> >> ... Reminds me of
> >> the days when I could see the Tri-X film I was
> >> loading onto reels for processing - yet the
> >> processed film showed no fogging from the
> >> light exposure during loading...;-)
>
> >Really? Tri-X, as in ASA 400? What kind of light--safelight?
> >I'm skeptical but curious.
>
> No - room-light from leaks. After your eyes accommodate,
> you can see in VERY low light levels (as the original
> poster noted) - and all films require a "threshold" level
> of intensity/time of light exposure before density appears
> on the processed film (and I apparently stayed under that
> threshold level while loading the Tri-X...;-).

And Tri-X has considerable reciprocity failure, so a weak exposure spread
over several seconds has appreciably less effect than the same amount of
light concentrated into a shorter time period.
Michael Covington