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BSI BS ISO 9848:2003

Photography. Source document microfilms. Determination of ISO speed and ISO average gradient
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BSI BS ISO 9848:2003

Photography. Source document microfilms. Determination of ISO speed and ISO average gradient

PUBLISH DATE 2004
PAGES 18
BSI BS ISO 9848:2003

This International Standard specifies a method for determining the ISO speed and ISO average gradient of black-and-white camera negative photographic films used for first generation microfilming of source documents at exposure times typically found with tungsten sources. These source documents include any handwritten or printed alphanumeric and line documents such as books, periodicals, business correspondence, and engineering drawings. The value-rating system described in this International Standard is only useful to the consumer if his exposure illumination is from an incandescent tungsten source as described in 5.3.3. It is not intended to include pictorial or continuous tone reproduction, computer output microfilm (COM), reversal processed or direct positive films or other films exposed by non-tungsten sources such as laser or cathode ray tube.

The ISO speed and ISO average gradient values obtained by applying this International Standard are intended for practical use in comparing film/process combinations and for computing exposures.

SDO BSI: British Standards Institution
Document Number ISO 9848
Publication Date April 5, 2004
Language en - English
Page Count
Revision Level
Supercedes
Committee CPW/42
Publish Date Document Id Type View
April 5, 2004 BS ISO 9848:2003 Revision