Fog is caused by a number of factors such as age, temperature, humidity, radiation, etc. The remedy is to process film as soon as possible after exposure. Freezing does not slow some types of fog.
Prompt processing also prevents fading of the latent image. This is particularly important with some films such as Ilford Pan F Plus where even a few weeks takes it toll.
Thanks for reply Gerald at first.Yes I knew the problems with PanF (modern type) I first can't belive it when I heard about.I never had this problems in the past with PanF but I must say also :Bw is mostly developed at the same day
..
But indeed it is a very good example to mark problems due to latent image stability.
There are several facts of impact to expired films (specially with color films) wich are responsible to cause changes of the original designed charactaristics of
emulsions. Yes I know and I also thought about it first.
Even freezed films will see the day of end
from its original quality.
I also have such films in my freezer - but it is extreme cheap stuff - best for tests or for experimental use, crossed processing a.s.o.
When I thing of todays pricing I can't belive the cheapness of this films (allways Kodak Proffessional E6 120/220) therfore it is ok if I try some corrections from developing.
But back to the theme : My Kodak EPP's are still in a absolute best condition.
There should be a context of expired date and a lost of latend image stability of cause it should be an impact.
Totaly new stuff (at this time for E6 only Fuji) will "survive" a couple of month in the camera with absolute no effects (lets better say with no "noticable effects" to the emulsion.
Yes that is indeed the different to PanF today - amazing at least.
Anybody else with an idea to modify (just for example) Derrek Watson in regard to compensate fog ?
As I still can remember and from the logic the key to it is to set on the first developer - so the example with PanF may help indeed a bit. Thanks again for it Gerald.
with regards