Message-Id: <199905162053.NAA18000@dns.ccit.arizona.edu> Date: Mon, 17 May 1999 08:54:03 +1200 From: David Adams <mailto:David.Adams@NATLIB.GOVT.NZ> Subject: Re: CDs v. photo CDs - longevity To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
As I understand it, the longevity of data on both CD media, Kodak Writeable CD (CD-R) and Photo CD Media are the same.'When appropriately stored (in the dark, 25 degrees C, 40% RH) the data life model (at a 95% confidence level) predicts t data lifetime of 217 years'.
This is quoted from "Lifetime of Kodak Writeable CD and Photo CD Media" http://www.cd-info.com/CDIC/Technology/CD-R/Media/Kodak.html
Be interesting to know what life expectancy other CD media is predicted using the same model ie. TDK, Sony etc.
David Adams Team Leader - Copying Services National Library of New Zealand Te Puna Matauranga o Aotearoa
Visit "Timeframes" - New Zealands' leading source of heritage images http://timeframes.natlib.govt.nz/
>>> Trudy Levy <mailto:iminteg@sirius.com> 05/14 11:07 >>>
Rosemary - PhotoCDs do have a different storage medium ( gold I think) then most CD-ROMs, but the Real point of PhotoCDs is their special scanning and compression technologies not their storage durability. I recently heard that Kodak has recently released these technologies to developers, but the result is a good color stability across platforms, very good compression and good scans for the price. If you are planning on sending film out to be scanned I highly recommend this technology. If you have other questions feel free to contact me off list.Rosemary Finn wrote:
> Hi. I am new to this listserv, so I apolagize if this question has been
> recently asked. I am currently working on the first phase of the Women's
> Suffrage Digitization Project for the Rochester Regional Library Council
> (NY). Members of the council are currently discussing archival storage
> options. As we live in Rochester, NY, home of Eastman Kodak, there is
> actually some "pressure" to use Photo CD technology. While I have conducted
> an exhaustive search for information on CD storage v. Photo CD storage
> (i.e. - comparisons of longevity, obsolesence, storage capactiy, etc.), I
> have not been able to find anything that does a direct comparison of the
> two, or even articles on the individual technologies that discusses the
> same issues so that I can make a direct comparison. I would appreciate any
> input on the comparison between the two. Thanks in advance.
>
> Rosemary Finn
-- Trudy Levy Image Integration 7 Third Ave. SF, CA 94118 415/750-1274 www.Sirius.com/~iminteg Images are information - Manage them The Power of Digital Expression is within your grasp. We can make it so Check out our tips as seen on ZDTV