Ill. Admin. Code tit. 44, § 4400.60 - Minimum Standards of Quality for Permanent Record Photographic Original Microfilm
Classification |
Description of Documents |
Background Density |
Group 1 |
High-quality, high-contrast printed books and periodicals; black type face; fine-line originals; black opaque pencil writing; and documents with small, high-contrast print. |
1.00 to 1.30 |
Group 2 |
Pencil and ink drawings; faded and very small print (for example, footnotes at the bottom of a printed page); scenic checks; documents with printed pictorial images; and newspapers. |
0.90 to 1.10 |
Group 3 |
Low-contrast manuscripts and drawings; graph paper with pale, fine-colored lines; letters typed with a worn ribbon; poorly printed, faint documents. |
0.80 to 1.00 (1:24 reduction or less) |
Group 4 |
Very low-contrast (worse case) documents can require extremely low background density. |
0.75 to 0.85 (1:24 reduction or less) |
Group 5 |
COM |
1.50 -2.00 |
Notes
Amended at 31 Ill. Reg. 8572, effective June 4, 2007
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