NDSA:Standards and Best Practices Working Group/Optical MeetingNotes/Youket

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