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emeritus · 27th Mar 2018, 11:02 pm

I have two unused (and probably unusable, expiry date Jan 1979) rolls of Polaroid type 47 roll film, retrieved from the dump at Marconi's in the 1990's. These are the original type of Polaroid films where each pack includes a resealable plastic container with a chemical-impregnated felt strip in a holder that you had to wipe over the print after development to stabilise it. I did open and examine a third one I got at the same time and when I opened the sealed pack, found that, although the wiper was still moist, the pods of chemicals in the roll of sensitive material that had to be burst to develop the image had dried up. Although the wipers are still moist, the ones I still have must have suffered the same fate, and are only kept as a reminder of the many rolls I used to use in oscilloscope cameras in the 1970's.

27th Mar 2018, 11:02 pm	#173
emeritus Dekatron Join Date: Jan 2012 Location: Brentwood, Essex, UK. Posts: 5,355	Re: Bygone Technology and Useless Items. I have two unused (and probably unusable, expiry date Jan 1979) rolls of Polaroid type 47 roll film, retrieved from the dump at Marconi's in the 1990's. These are the original type of Polaroid films where each pack includes a resealable plastic container with a chemical-impregnated felt strip in a holder that you had to wipe over the print after development to stabilise it. I did open and examine a third one I got at the same time and when I opened the sealed pack, found that, although the wiper was still moist, the pods of chemicals in the roll of sensitive material that had to be burst to develop the image had dried up. Although the wipers are still moist, the ones I still have must have suffered the same fate, and are only kept as a reminder of the many rolls I used to use in oscilloscope cameras in the 1970's.