https://wiki.diglib.org/index.php?action=history&feed=atom&title=NDSA%3AStandards_and_Best_Practices_Working_Group%2FOptical_MeetingNotes%2FYouket 2026-04-16T08:55:46Z Revision history for this page on the wiki MediaWiki 1.44.0 https://wiki.diglib.org/index.php?title=NDSA:Standards_and_Best_Practices_Working_Group/Optical_MeetingNotes/Youket&diff=7005&oldid=prev 2016-02-11T19:20:49Z

<p>3 revisions imported: Migrate NDSA content from Library of Congress</p> <p><b>New page</b></p><div>*&#039;&#039;&#039;Michelle Youket (LOC)&#039;&#039;&#039; <br /> **Goal is to develop strategies for preservation of optical media<br /> **Natural and accelerated aging<br /> **1996 - pilot study - 125 random optical discs were selected from LOC collections<br /> **Monitor effects of storage and use<br /> **Later expanded to 1200 discs and wide range of dates of manufacture<br /> **Follow 1SO 18921 standard<br /> **Adhesive labeled disc after 1000 hours aging error rates higher<br /> **Measured effects of laser engraving<br /> **CD-R more stable than DVD - larger size of data pitch for CD, more data to be corrupted in a smaller area with DVD.<br /> **Dye and reflective composition - significant factor in degradation - gold more stable than silver.<br /> **Cyanine, meant as long strategy dye.<br /> **Phthalocyanine - at times, hard to differentiate upon inspection.<br /> **LOC created error checker software as an assessment tool. <br /> **JVC archival disc system error checker disc drive<br /> **Disc-to-disc migration<br /> **Burn tests<br /> **Report fields: media / brand / dye / jitter</div>

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