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Author Topic: Maintaining film projection ability long-term Terry Lynn-Stevens Phenomenal Film Handler Posts: 1081 From: Toronto, Ontario, Canada Registered: Dec 2012 posted 03-13-2014 12:26 AM                     Chris, your example of The Prestige having bluray rot is a manufacturing defect. It would be just the same as the original 35mm negatives of The Prestige having a manufacturing defect as well.  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 03-13-2014 01:05 AM                        Apologies for radio silence - snowed under for the last couple of days (OK, not a good metaphor, given the 80-degree sunshine in SoCal, but it'll have to do). Still cogitating Steve's recent post - more soon.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 03-13-2014 09:11 AM                     Wow...here is your 50-cents for that word Leo!  |  IP: Logged Mike Blakesley Film God Posts: 12767 From: Forsyth, Montana Registered: Jun 99 posted 03-13-2014 11:24 AM                        quote: Terry Lynn-Stevens bluray rot is a manufacturing defect I don't know if you'd call it a defect or just a characteristic of the materials used. The materials in the blu-ray can supposedly degrade over time and make it unreadable. Back when CDs were a hot thing, it was called CD rot, same thing. I heard it was mostly experienced by people who live in tropical areas with high temps/high humidity. I don't know if it was limited to certain manufacturers or not -- but since CDs and Blu-Rays are just basically plastic and aluminum, it probably would have been across several (or all) manufacturers. Since our area here is neither tropical nor very humid, I've never seen it myself. I've still got quite a few CDs that I bought back in the very early days of CD and they all still play fine, but I guess it can happen.  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 03-17-2014 04:14 PM                        CD rot was caused by the dyes in some early screen-printed CD labels in the 1980s eating away at the substrate, if I remember correctly. As for Steve's earlier points, they basically boil down to how important you believe medium specificity to be in communicating authenticity, either in an objective sense (evidence that an obsolete medium does or doesn't give you about the production and/or consumption of the original recording) or a subjective one (artistry, personal vision etc.). I get the impression that, all other relevant factors being equal, he believes that it is necessarily more so than I do.  |  IP: Logged Terry Lynn-Stevens Phenomenal Film Handler Posts: 1081 From: Toronto, Ontario, Canada Registered: Dec 2012 posted 03-24-2014 01:41 PM                     quote: Leo Enticknap Research is still going on as to the comparative costs of film preservation vs. digital preservation using known-to-work methods we have at present (including by one of my former students), but early indications are that per minute of running time at a given image quality and per year of reliable archiving, film is still a lot cheaper. A good short documentary on how difficult film can be for preservation can be found on the special features dvd for Roman Holiday. The 35mm print was stored at the Paramount archives.  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 03-24-2014 03:01 PM                        With regard to CD rot, couldn't this issue be resolved by using a high grade metal disc, rather than a plastic disc. I know a metal disc would be prohibitively expensive for consumer applications, but it seems like a metal disc would be ideal for archival applications. Furthermore, I would imagine the money involved with the film industry would allow for the creation of a larger, high capacity disk which would allow images to be stored at the highest possible resolution. Even if such a disc were to cost $2,500 - $5,000 each to produce, wouldn't it be worth the cost?  |  IP: Logged

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