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Out of Date B&W Film

Lubbyman
Posted 23/09/2021 - 17:46 Link
I've decided to run a roll of B&W film through the *ist just for fun.

As expected, there was an in-date roll where I keep odds and ends. What I didn't expect to see was an out of date roll of Ilford HP5 Plus 400 sitting next to it. The date on the box is July 2014, it's been kept at room temperature (not in the sun!). I'm willing to give it a go, but is there any need to modify exposure for it being over 7 years out of date? It will have to be processed commercially, so anything that needs to be done during processing must be available (and at a reasonable price, please :wink.

Steve
cardiffgareth
Posted 23/09/2021 - 21:26 Link
I can't remember the rule but it was like half a stop per year out of date?
Gareth Williams ARPS

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cardiffgareth
Posted 23/09/2021 - 21:45 Link
Gareth Williams ARPS

My outfit: K1ii - Pentax D FA 24-70mm f2.8 - Pentax DA* 300mm f4 - Pentax modified DA* 60-250mm f4 - Irix 15mm Firefly - Pentax FA 35mm - FA 50mm f1.4 - Tamron SP 90mm macro - Pentax AF 540 FGZ II

Welsh Photographer
Flickr
Instagram
My PPG
Foundation NFT
Lubbyman
Posted 23/09/2021 - 22:28 Link
Thaniks, an interesting read. Half a stop per 10 years seems to be the best guess. And bracket if it's an important shot. Just got to find something interesting to photograph that isn't the grandchildren.

Steve
johnriley
Posted 23/09/2021 - 22:53 Link
It all depends how film is stored. I once sold some old glass plates (EXP 193 and was told they were fine if exposed at about ISO 1. A clip test tells us for sure, that is developing a short length of the film to see if the rest of it needs different timing.
Best regards, John
johnriley
Posted 23/09/2021 - 22:54 Link
The expiry date was nineteen thirty-eight, but 1938 will do if I don't put the ) in..
Best regards, John
Edited by johnriley: 23/09/2021 - 22:56
Jonathan-Mac
Posted 24/09/2021 - 07:38 Link
I thought it was a full stop for each ten years.

I'd run it through at ISO 250 (assuming your camera can over-ride the setting on the cannister) and develop as normal.

HP5 should be pretty forgiving but always better to over-expose a little than under-expose.
Pentax hybrid user - Digital K3, film 645 and 35mm SLR and Pentax (&other) lenses adapted to Fuji X and Panasonic L digital
Fan of DA limited and old manual lenses
Edited by Jonathan-Mac: 24/09/2021 - 07:38

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