[LargeFormat] Keeping Film Cool (was Re: A new departure)

[Brock Nanson]

Interesting.  I have that copy around somewhere... the summer ones usually
get stockpiled for the winter, but I haven't had time to get my nose into
them this year yet!

The test would certainly be on the extreme side of actual experience.  The
results could likely be considered a worst case for most responsible
photographers.  I'll dig for my copy of that issue and do some learning!

Brock

----- Original Message -----
From: "john frost" <johnfrost@sprintmail.com>
To: <largeformat@f32.net>
Sent: Thursday, March 14, 2002 12:33 PM
Subject: Re: [LargeFormat] Keeping Film Cool (was Re: A new departure)


| Part of your proposed project has been done. The PHOTO TECHNIQUES
| magazine for MAY/JUNE 2001 has an article pertaining to heat damage to
| B&W and color negative and reversal films.
|
| The test ran to 40 (forty) days at 110F (Fahrenheit). Looking at the
| results, some films pick up density and some lose density. This may be
| useful for zone system workers using color materials!
|
| I would be interested in your test results going to 150F. I wonder if
| there is a smelter in the area that would let us store film above their
| furnaces for six months or so....
|
| john (:>)
|
| Brock Nanson wrote:
| >
| > I think it would be interesting to test the heat effects and try to
quantify
| > the damage.  Where I live, the summer temperatures approach 40 Celsius.
| > Where I holiday, the temperatures can get that high as well (usually
| > Queensland).  I don't leave the film in the passenger compartment... the
| > glass gets the greenhouse effect going in a big way as you say!  I use
the
| > trunk... much cooler, even if the paint is dark (the amount of
temperature
| > rise in a dark car is not that much more than a lighter car - it's the
glass
| > that counts!) and leave the film in the camera bag which is a fairly
good
| > insulator too I've found.  If I'm not shooting black and white, it's
Velvia
| > and I've never had an issue with unexpected colours!  Perhaps in a lab
| > setting with cold samples and warm samples there might be a difference
| > detected, but after adding polarizers, warming filters, etc, it's hard
to
| > look at the result and say 'crap, I should have kept the film cold!'.
| > Colour temperature of the sun at different times of the day...
sunsets...
| > hard to quantify.
| >
| > A lab test would be interesting to try...!
| >
| > Hot Mountain Dew... that's a thought I don't like to contemplate!!!
It's
| > bad enough cold!!
| >
| > Brock