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> Expired film |
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#1
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Expired film
Does expired film need ISO rating or development time altered to compensate?
If so are there any general guidelines per year or such? Thanks
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Ian |
#2
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Hi Ian,
The general consensus is to give an extra stop of exposure per decade. Anything less than ten years of age should be fine to expose at box speed. |
#3
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Hi Ian,
I found an more than 10 years old, expired, unused Acros 100 in my camera bag. I exposed it 1 stop more than usual according to the data sheet of SPUR HRX and gave about 15% more development time than indicated in their data sheet - I had asked for advice from SPUR. What should I say? Their recommendation worked: the film came out quite nice! It was only a test film, but it worked. Good luck! |
#4
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Thanks for the quick answers.
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Ian |
#5
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I am currently using OOD 120 Film - TMX100 & Delta100 - whose expiry date was the early 2000s at the box speed and developed in Xtol 1+1 for the times in the Massive Dev Chart and they are fine.
However, I have recently exposed some OOD Patterson Acupan 200 (which I understand from an internet search is Fomapan) (Dated 2000) at both ISO200 and subsequently ISO100 developed for the Massive Dev Chart recommended 8½ Min. and they gave very thin negatives in both cases. I think I shall develop them for a longer time next time (say 11 Min). I have in the past 5 yrs used PanF dated early 1990s at the box rate and developed for the suggested times and they came out fine. A case of you have to try it and see what happens and if necessary undertake more formal tests with trial bits of film as suggested in a previous Thread about these matters. Mike |
#6
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Quote:
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Mitch http://photomi7ch.blogspot.com/ If you eliminate the impossible whatever remains no matter how improbable must be the truth. |
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