Archived posting to the Leica Users Group, 2013/03/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Yes, all the very high speed film had that propensity. Keeping it cool or freezing it didn't help it much. The fast Polaroid film had the same problem, except you couldn't freeze that anyway. On the other hand, Agfapan 25 and things like that keep forever in the freezer. It seems that up to 400 speed for B&W, keeping it in the freezer until the expiry date generally resulted in undegraded images, and developing it within a month or so of exposure also was fine. For colour film things were different, as the layers were actually of different speeds and had to be higher than the nominal speed due to the filter layers. So if you didn't store, expose and develop it promptly and correctly, some layers started to lose speed and you got colour shifts even with 160 speed. Kodachrome 25 was fairly safe from this. Henning On 2013-03-01, at 3:41 PM, tedgrant at shaw.ca wrote: > Tina Manley SHOWED: > Subject: [Leica] IMG: TMZ 3200 > > > Hi Tina, > That TMZ-3200 Looks like some I had in the freezer some years ago and > unfortunately Irene had buried it under some frozen foods she had bought. > > About 8 months later I discovered it, used it and the grain was the size > of house bricks! :-( > > I enquired of our Kodak rep....... a very astute gal with almost every > technical question you could ask and she could answer right off the top of > her head without referring to anything. > > Much to my surprise she said... "3200 film should be used as soon as > possible, don't have it hanging around for months, particularly if you > should push it a stop or two." > > Why?" I asked. > > SHE.. responded, "Well it's such a sensitive film that unless you use it > as soon after purchase, the radiation levels of Planet Earth will begin to > fog it. Or start a form of exposure. That actually begins the day the film > is manufactured whether the film is in a freezer or wherever? The effect > is going on all the time due to radiation levels of the planet! So if > you're working with it always get it exposed and souped as soon as you > can." > > So crew, given Tina's grainy photo triggered that bit of long ago KODAK > conversation from many years past, I wondered has anyone ever heard of > that before? I can see it as a possible with 3200 TMAX, but have always > been left with a bit of a question mark how bad it might get and whether > my "what appeared super grainy size images were actually due to what she > said? Or just pushing it to 6400? And or maybe? A bad moment of film > souping?" > > Thoughts and or answers? Of course it's an almost waste of time question > now most are shooting digital. It's purely a curiosity driven question aat > this point? Oh and of course, I exposed all film with a Leica "M?" camera. > ;-) > thanks, > cheers, > Dr. ted :-) > > > > > > > >> Here is why some of my scans are so grainy. This is TMZ 3200 as you can >> see by the film canisters that Junior is holding. >> >> http://www.pbase.com/image/149007766 >> >> The kids love empty film canisters and use them for soldiers and cars and >> all kinds of toys that they invent. As long as I can keep the exposed >> film dry, if I don't have to carry the canisters back home, that's fine! >> >> Besides the obvious grain, C&C greatly appreciated!! >> >> Tina >> >> -- >> Tina Manley, ASMP >> www.tinamanley.com >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > Henning Wulff henningw at archiphoto.com