[Leica] FS: Film from the freezer

[John Nebel]

In 20 years, cosmic rays may have slightly fogged the ASA 400 film, be 
interesting to see.  Worth a go anyway.

"Ambient Background Radiation (Effects on Raw Stock
Ambient gamma radiation is composed of two sources: a low energy 
component which arises from the decay of radionuclides and a high energy 
component which is the product of the interaction of cosmic rays with 
the earth's upper atmosphere. The radionuclides responsible for the 
low-energy photons exist in soil and rock and are carried into earth 
derived building materials such as concrete. Lead shielding or storage 
deep underground may be helpful, but for long-term raw stock storage, 
radiation will still be a factor. Upon exposure to ambient-background 
radiation, photographic materials can exhibit an increase in minimum 
density, a loss in contrast and speed in the toe, and an increase in 
granularity.

The change in film performance is determined by several factors, such as 
the film speed and length of time exposed to the radiation before the 
film is processed. A film with an Exposure Index (El) of 500 can exhibit 
about three times the change in performance as a film with an El of 125. 
While this effect on a film product isn't immediate, we still suggest 
exposing and processing the film soon after purchase. We recommend a 
period of no more than six months from the time of film purchase before 
exposure and processing, provided it has been kept under specified 
conditions. Films kept for extended periods beyond six months may be 
affected, especially the faster films, even if they have been frozen. 
The only way to determine the specific effect of ambient-background 
radiation is to make actual tests or measurements by placing a detector 
in the location where the film is stored. The most obvious clue is the 
observance of increased granularity, especially in the light areas of 
the scene."

<http://motion.kodak.com/motion/Support/Technical_Information/Storage/storage_info.htm#radiation#ixzz3nNB04BHX>



On 10/1/15 6:07 PM, Richard Man wrote:
> Ken, I will take them.Please send paypal/address info.
>
> Thanks
>
> On Thu, Oct 1, 2015 at 10:13 AM, Kenneth Lassiter <kenlass904 at gmail.com>
> wrote:
>
>> As part of my downsizing, I must remove my stash of film from the freezer.
>> Thi sfilm was fresh when it was put into the freezer 20 years ago. It
>> should be perfect when warmed to room temperature.  It has been stored in
>> the plastic cans inside freezer bags inside a large plastic container and
>> always in the freezer.
>>
>> Price REDUCED:US$60 for the lot of 115 rolls including shipping in the USA.
>>
>> OR US$0.75/roll plus shipping.
>>
>> *# Rolls*
>>
>> *Film*
>>
>> *135-36 exp*
>>
>> *135-24 exp*
>>
>> 25
>>
>> Ektachrome 200 Daylight
>>
>> X
>>
>>
>>
>> 26
>>
>> Ektachrome 100 VS
>>
>> X
>>
>>
>>
>> 15
>>
>> Fuji 100 Daylight slide film
>>
>> X
>>
>>
>>
>> 7
>>
>> Fuji 400 Provia
>>
>> X
>>
>>
>>
>> 4
>>
>> Ilford Delta B/W
>>
>>
>>
>> X
>>
>> 7
>>
>> Kodak Supra 100 Color Neg
>>
>> X
>>
>>
>>
>> 5
>>
>> T-max 400
>>
>> X
>>
>>
>>
>> 8
>>
>> Fuji Sensia 200 slidefilm
>>
>>
>>
>> X
>>
>> 5
>>
>> Kodak Porta 400 NC
>>
>> X
>>
>>
>>
>> 4
>>
>> Kodacolor Gold 200 Color Neg
>>
>>
>>
>> X
>>
>> 1
>>
>> Kodak IR Ektachrome Prof
>>
>> X
>>
>>
>>
>> 3
>>
>> Kodak Max 400 color neg
>>
>>
>>
>> X
>>
>> 10
>>
>> Misc mixed single rolls
>>
>> X
>>
>> X
>>
>> *115*
>>
>> *Total rolls*
>>
>>
>>
>>
>>
>> Ken Lassiter
>> kenlass904 at gmail.com  OR 561-247-7725
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>>
>
>
>