RE: [APML] Bulk tech-pan storage

[John Mirtle <spampit@shaw.ca>]

	Good questions George, some of which I would like answered as well.
Up to recently, tech pan was plentiful so questions of long term storage
never came up. In the past, Tony H. has mentioned grain clumping in frozen
colour film. You know as much as I do whether or not this is an issue with
thinner, single layer emulsions like tech pan. I have chosen to keep it
double ziploc'd in the fridge. With 150' rolls, you use very little at a
time. This would mean repeated thawing/freezing of the bulk roll. I can't
see this being a good thing!

	Whatever method you choose, let the roll warm up to ambient for an
hour or two before opening any bags. The last thing you want is for moisture
to condense on anything, especially if it is going to be frozen again. Also,
when loading into a 35mm canister, take your time. Dry film dragging across
felt can generate static, producing lightening bolts across the image. This
may not be a problem in Florida but it certainly is in the Canadian
prairies! Sorry I don't much to add.

John Mirtle
Calgary, Ab. Canada

-----Original Message-----
From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org] On
Behalf Of George Anderson
Sent: Friday, May 20, 2005 10:44 PM
To: APML
Subject: [APML] Bulk tech-pan storage

I have one roll of 36 exp tech-pan that I am about to split into three
rolls, after that I will be loading my 150 foot roll of TP (currently in
the fridge) into one of my bulk loaders.
What is the safest storage for the bulk loader (and film)?
1) Store it in a ziploc with dessicant in the fridge?
2) Store it in a ziploc in the fridge?
3) 1 or 2 but stored in the freezer?
The TP will be hypered as required with approprite storage after
hypering.
Also how long should I let the bulk loader adjust to room temp (bagged)
before I start spooling film off of it?
Many thanks in advance

George Anderson
Montreal Canada

Clear skies and good health
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