accozzaglia: (colourful little heptagonal star)
[personal profile] accozzaglia
The results are in. My favourite two three are here. There rest are on my flickr page.

[Keep in mind: I was fortunate to even have had this sitting in my freezer for the last couple of years and managed to buy it for about 40% off regular price (of about $27) two years ago — so about $18. The going price for these on the pleaBay lately is $90. And mind you, they're all expired, and they have to be in the freezer all the time (up to 2-3 days at cool ambient temps is usually acceptable) or they'll spoil.]

Date: 2009-07-27 02:07 pm (UTC)
From: [identity profile]
i found expiration to be a matter of suggestion. usually they're fine. OR being expired actually produces an interesting effect. i used paper from 1994 in 2006 and it was kinda neat.

Date: 2009-07-27 05:40 pm (UTC)
From: [identity profile]
Agreed for most cases. As long as film's kept cold-stored, changes to emulsion come slowly and lasts for years, no problem. If I am buying film for certain aged effects, I'll look for people who've never stored their stuff cold. That just causes emulsion spoilage and major colour shifting. For oddball stuff like the above where certain colours are key, having fresh is best.

The two exceptions I know of are time, in which passage of cosmic rays accumulate and fog the film, while proximity to radon gas decay and high elevation are gamma ray killers and will similarly fog film, but often much faster. I've shot 15-year-expired Kodachrome that came from Wisconsin and saw loss in Dmax (the blacks) due to said fogging. For gamma rays, they say lead-lined boxes help slow that, but cosmic rays are unstoppable and pass through everyone and everything, including planets as if solid objects don't even exist.

The other exception are particularly unstable emulsions like Ektachrome EIR (the colour infrared film here) and HIE (the b/w infrared film Kodak also stopped making). They're the only films I know of where the indicator icon for proper temperature storage say "-18°C/0°F or lower", so the fridge alone is out. I keep mine in back of the freezer, but even that is no assurance for the cosmic/gamma ray wear and tear. Fortunately, radon incidence is low in most of the places I've lived over the last several years, Minneapolis being the sole exception. Also unclear is how bad things are in Montréal. Apparently it's higher there due to its proximity to Appalachia, a known haven for radon decay.

So yeah, this is tl;dr. Bleh.

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