On 1/9/02 2:19 AM, "John Hudson" <jahudson@xxxxxxx> wrote:
snip
Does not "....it's not aged...." mean that the Elitechrome has been
issued to store shelves or refrigerators weeks or months ahead of the
time it would have been delivered had it been labelled E100S? As I
understand it, professional films are delivered to outlets very close to
the point in time when they are slated to be used, rather like fine
wines which have been cellared to perfection and are ready to drink.
Yes. The colour balance of the film changes with age. At some point after
manufacture, it reaches it's best quality. Professional versions are aged
before leaving the factory and are then stored in refrigerators to maintain
the ideal age. Amateur film is shipped from the factory right away (or with
minimal aging). This is because amateur film is usually stored
un-refrigerated and it will age on the shelf. It's also done because
generally, amateurs will take much longer to finish a roll and be less
likely to store it properly (such as leaving a camera in a car parked in the
sun). A pro is likely to buy the film and use it immediately or refrigerate
it themselves. When taken out, they will tend to use it up very quickly and
have it processed as soon as possible.
My understanding is that this difference it mainly of importance when the
colour over many rolls needs to identical. If this isn't a concern, or if
you will be travelling with the film in adverse conditions without the
ability to keep the film cool, then amateur film is often a better idea, if
the emulsion is the same.
Someone once told me that when film is produced it's made in very large
sheets and is then cut down. The best quality film is in the middle. I
wonder if the pro film comes from closer to the middle than the amateur. Not
sure if that's the case or if the story about the middle of the sheet being
the best is true, just speculating.
--
Andrew "Frugal" Dacey
frugal@xxxxxxxxxxxxxxx
http://www.tildefrugal.net/
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