Dear Susan, The lifespan of polycarbonate discs, with silver/silver alloy data layer, and "commercial" dye (aka CDs, DVDs, etc). is "on real practice", with much luck 17 -20 years. Oxidizing processes of silver and/or alloy and dye is very fast. It has been theoretical predicted that with proper and careful conservation practices CDs might last hundred years. But unfortunately... There are new technologies (blue ray recording), gold layer discs, but that will rise your costs enormously. There are also other considerations tobe taken when digitizing, such as: compatibility, data lost on transfering information (due to file compression formats and data coding formats), migration to new hardware platforms, etc. For my money, I will keep my maps... Undergoing a digitizing initiative is not an easy decision. You will then have to take care of those discs, and believe me, they require much more care that ancient books. Best, Gabriela Torres Digital Libraries Researcher Universidad de las Americas - Puebla Mexico
On 2/12/07, Susan Fishman-Armstrong <sfishman at westga.edu> wrote: > A couple of conservation questions: > > Our laboratory director came to me last week. He is starting to digitize > his old maps on DVDs. > > He ran across some information that said that the lifetime of DVDs is only 5 > years. Is that true? > If so, what is the estimated lifespan of the gold plated DVDs? > Finally, is the lifespan of DVDs shorter than CDs? > > Thanks, > > Susan > > +++++++++++++++++++++++++++++ > Susan Fishman-Armstrong > Laboratory Coordinator > Antonio J. Waring, Jr. Archaeological Laboratory > University of West Georgia > Carrollton, GA 30118 > > 678-839-6303 (office) > 678-839-6306 (fax) > www.westga.edu/~ajwlab/ > > > -----Original Message----- > From: mcn-l-bounces at mcn.edu [mailto:mcn-l-bounces at mcn.edu] On Behalf Of > Amalyah Keshet > Sent: Sunday, February 11, 2007 3:05 AM > To: mcn-l at mcn.edu > Subject: [MCN-L] IP SIG: Copyright at the Whitney: the > Oldenburg-PicassoExhibit > > Interesting post at : > http://wendy.seltzer.org/blog/ > > "Copyright at the Whitney: the Oldenburg-Picasso Exhibit It goes without > saying that I can't go anywhere without seeing copyright issues lurking in > the background. The last room of the Whitney's "Picasso and American Art," > however, forced them to the foreground..." > > > > > > > > Amalyah Keshet > Head of Image Resources & Copyright Management > The Israel Museum, Jerusalem akeshet at imj.org.il > Chair, MCN IP SIG www.mcn.edu > Blog www.musematic.net > > _______________________________________________ > You are currently subscribed to mcn-l, the listserv of the Museum Computer > Network (http://www.mcn.edu) > > To post to this list, send messages to: mcn-l at mcn.edu > > To unsubscribe or change mcn-l delivery options visit: > http://toronto.mediatrope.com/mailman/listinfo/mcn-l > > > _______________________________________________ > You are currently subscribed to mcn-l, the listserv of the Museum Computer > Network (http://www.mcn.edu) > > To post to this list, send messages to: mcn-l at mcn.edu > > To unsubscribe or change mcn-l delivery options visit: > http://toronto.mediatrope.com/mailman/listinfo/mcn-l >
