Dear All,
Paper age, fog levels and useability are entirely subject to how the paper has been stored since its manufacture.
The paper is very stable when manufactured and stored correctly, and thats the key, when we say store in a dry and cool area thats what we mean, the drier and cooler the better. We have all seen examples of paper 10 years older or more that is perfectly usable, incidently, and to the best of my knowledge no one has done a scientific or psuedo scientific test between the various manufacturers but I doubt they vary a huge amount, the grade and quality of the ancillary chemicals used in manufacture has one of the biggest effects, needless to say ILFORD Photo only use the highest quality. Our QC regime demands a 5 year safe life stored at 20c or below, in 25 years with the company I have never seen a QC for any of our paper products for base fog less than that, we have obviously had a few 'abused' boxes.
Simon. ILFORD Photo / HARMAN technology LImited :