South Dakota Administrative Rules
Title 10 - Bureau of Administration
Article 10:04 - State records management program
Chapter 10:04:02 - Standards for micrographic records
Section 10:04:02:07 - Density specifications

(1) Background density in first-generation negative microfilm of documents must be maintained as nearly as practical in the range of 0.92 to 1.20. No density over 1.25 or under 0.87 is allowed;

(2) If a density in first-generation negative microfilm of documents occurs in the ranges 0.87 to 0.91 or 1.21 to 1.25, the records officer shall determine by visual inspection that all such images satisfactorily reproduce all required record information;

(3) Background density in first-generation computer-output microfilm must be 1.50 or greater; and

(4) The density of microfilm in a clear area (base plus for density or Dmin) may not be greater than 0.10.