Expiration of film stock?
Posted 23 April 2006 - 03:56 PM
Posted 23 April 2006 - 05:44 PM
Why this is, I don't know. But I have my old conspiracy theories and they go something like this: they don't WANT to date the stock because that means they'd have to scrap or buy back old stock from the distributors, which would be seriously expensive.
People are also overly freakish about dates on film - just have a look at the bargains one can make on Ebay for stock that is out of date by so much as a day. Film doesn't self-implode and go bad overnight. It's not milk.
Their way, the stock gets used under the assumption that what you don't know, can't hurt you. Quite clever, actually, and probably a good thing. At least more environmentally friendly.
Posted 25 April 2006 - 11:00 AM
Posted 25 April 2006 - 04:55 PM
Posted 25 April 2006 - 07:57 PM
The shelf life of the film stock depends entirely on the storage conditions. Since the manufacturer has no control over the way film is handled after they sell it, they obviously can't predict an "expiry date". Brand new stock might go off in a week if it's kept in a car boot (trunk) for a week in direct sunlight. Or it could last for several years if it's kept in a fridge.
Where is the expiration of film stock on the film-can?
Also, as the age fog increases gradually, there is no absolute cut-off point. Stock that is too far gone for some types of shot might still work well in other productions.
Expiry dates are useful for foodstuffs where you can't test the product (except by eating it and getting sick/not sick). They will be accompanied by instructions like "keep refrigerated" if that makes a difference.
You can always test filmstock if you are uncertain about its condition.