Quality Assurance and Quality Control for Microfilm Products

  • Microfilm products conform to the NARA CFR1230 SubPart C: Microfilm Standard
  • Film Processing
    • Black and White Film
      • B&W processing is conducted in-house.
    • Methylene blue testing (implementation underway)
      • ISO 18917 1999 compliance: Methylene blue testing to measure residual thiosulfate and its decomposition products is of use in appraising the adequacy of washing and therefore the permanence of the silver image on photographic films, plates and papers. Inadequate washing can cause a loss in image density and the formation of stain in low-density areas.

Top of Page

PDF files require the free Adobe Reader.
More information on Adobe Acrobat PDF files is available on our Accessibility page.

Preservation >

The U.S. National Archives and Records Administration
1-86-NARA-NARA or 1-866-272-6272