Re: Wet HIE Film Boxes

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On  6 Jan 97 at 17:37, Robert Long wrote:

> |Btw, I wouldn't know what to do without the paper warning sticker on
> |the lid of the cannister/container: scratching some paper of it is the
> |only way for me to see whether the film is exposed or not....I can't
> |look inside, can I?....;-))
> 
> Well, you can leave the film in the box until you load it.  Then any
> film that is in the canister but not in the box has been exposed. =20

You probably never stuffed a PhotoTrekker to its max....8-))
There is not much room for boxed containers....and even if, the 
hectic of dark loading a camera on a ski slope definately requires 
some foolproof way of distinguishing exposed from non-exposed film. I 
can control what goes in and out of my darkload bag, but what is floating 
around in my rucksack is beyond control....:-)) 

Have been thinking of putting a picture on the web of the bag loaded
in combat condition. Just to prove my knapsack like magic packing 
capabilities of course....;-))

Serious, would be interesting to see various packing solutions for
various equipment (MF/LF as well) and various bag's from other
people, just to show some examples of packing miracles. It sometimes 
takes years of pondering and tinkering about the optimal setup.

To keep this IR related: my dark load bag goes in the large net on 
the back of the PhotoTrekker....:-))
 
> | Even now it requires more discipline that I would like to
> |keep them apart....I have started to scratch the sticker the moment
> |I take it out of the dark load bag after I loaded a film (empty
> |container)....8-))
> 
> Um...  I just shake the canister to tell whether it's empty.

With the chance of putting in exposed film without marking the 
container as exposed....remember, I would only discover that mistake inside 
my dark load bag, and I might as well have mistaken it for my last film in a 
shooting, whereas I actually ran out of film. I would have missed a 
few once in a life time shots for sure!
I try to keep the fresh film boxed, but I will not rely on it in such 
hectic conditions. Murphy is greedingly looking over my 
shoulder when I start fiddling in the bag....every time a lid goes 
back on an exposed film I feel relief....8-))

 
> I've wondered about the "blistered" look of the boxes.  Perhaps
> pockets of moisture trapped inside the cardboard freeze and swell to
> create that look.

Probably delaminating from moisture, with different 
humidity-expansion rates causing the bulging. Ice also expands 
(although I remember water of +4C having the largest specific 
volume), so a soaked part might expand more than an (inner) dry part.

Btw, I believe most aerial films including IR have not only thermal 
expansion specifications, but also humidity expansion spec's.

 
--
Bye,

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      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 4