James, All colour emulsions lose sensitivity due to natural radioactivity and internal diffusion between layers. I hear the rate is somewhere around half of stop each year, maybe more for faster films. It also depends largely on the film. Servus, Alin James wrote: JA> A professional photographer friend of mine, recently gave me some surplus JA> date expired B&W and Colour films he had stored in his freezer. As he is JA> away at Whisler as a ski instructor most of the ski season, he would not be JA> able to use the film. He also said, I may need to adjust film speed down JA> [e.g. 3200asa to 800asa]. Can anyone explain why (can't get hold of him to JA> ask more)? JA> The film types are: JA> 1. Tmax TMZ 135 p3200 JA> 2. Kodak Pro1000 PMZ-36 (C-41) JA> 3. Kodak Tmax-400 TMY-36 JA> 4. Kodak Pro Supra 400 - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
