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ISO 8126:2000 Micrographics - Duplicating film, silver, diazo and vesicular - Visual density - Specifications and measurement
standard by International Organization for Standardization, 02/01/2000
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Full Description
This International Standard specifies visual diffuse transmission densities for second generation silver-gelatin and diazo microforms and projection densities for second generation vesicular microforms. It also specifies methods of measurement.
It does not apply to duplicates of microforms of technical drawings and other drawing office documents.