Keywords:
Approval marks, Contrast (optical), Density, Dimensions, Dissolution, Legibility, Legibility tests, Lines (geometry), Marking, Measurement, Microfilm, Microforms, Micrographics, Mire, Projection (drawing), Reflection, Reprography, Resolution, Resolving power determination, Specification (approval), Test charts, Test equipment, Testing, Tests, Tolerances (measurement)