*- DORIS FANG -* wrote:
>
> On Thu, 9 Jul 1998, Paul Van Tuyl wrote:
>
> > His educated comment was to leave it in the can to warm
> > up. I had never heard of anyone doing this because it keeps the moisture
> > in the can with the film! An obvious dumb thing to do.
>
> Paul, I beg to differ, and so does Kodak.
>
> > However, knowing
> > Lee is somewhat informed, I telephoned a number of professional
> > photographers that use frozen, outdated film in their work. We sell to a
> > bunch of wedding photographers and serious amateurs who buy 50 to 100
> > rolls from us at a time.
> > It was unanimous, no one leaves the film in the cannister to warm up.
> > Most take the film out of the cannister and throw it into their
> > equipment bag right away to be ready to shoot as the situation dictates.
>
> A bunch of people can be wrong, and these are. They would be best
> served by defrosting film (around 3 hrs is right at room temp) ahead
> of time, then removing film from the canisters if they want. This is not
> IMHO a good practice anyway because dirt & lint accumulate at the bottom
> of many bags (unless one vacuums them out), and I have read about people
> whose DX coding was disrupted by lint/dirt, causing lost shots. It also
> introduces crud into your cameras.
>
> > Most everyone's comment was, does someone actually leave it in the can?
> > Next time look inside the cannister and see the moisture that collectsd
> > there.Too bad Lee. OLYMPUS Dude.
>
> First, there's the elementary physics of the situation, Paul. If you
> have a sealed container and there's no moisture inside of it at normal
> room temp/pressure, why should moisture be CREATED when you defrost it ?
> Second, call Kodak, or RIT. Kodak film is canned under very low humidity
> conditions. This is to prevent the emulsions from swelling due to water
> in the form of humidity.
> Lee is EXACTLY right. If you open the canister before it is defrosted
> (i.e., at room temp) you will load the emulsion with water due to
> condensation. It will pull water out of the air, in other words. It cannot
> do that inside the can, Paul. Go and open a new film canister (at room
> temp/press). Do you see any moisture in it ? Had you not opened it, frozen
> it, and waited for it to totally defrost and reopened it, I guarantee you
> there would not be any more moisture in it. Lee is right on this one.
> Don't take my word or Lee's for it. Pull a brand-new, unopened canister
> from the freezer. Let it defrost overnight. Then open it and look inside.
> You will see no moisture at all. See for yourself.
>
> Sorry to get in the middle
> *= Doris Fang =*
>
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Well you gotta admit it takes all kinds of comments to make for an
interesting discussion! God bless us all! Paul.
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