Photography. Source document microfilms. Determination of ISO speed and ISO average gradient subscription-only c) The purchaser needs assurance

c) The purchaser needs assurance that the dependability requirements are being

specified in BS EN ISO 17636-1

Information about Substrate sampling and categories

The following lamp types and modes of operation with external ballasts are included:

Photography. Source document microfilms. Determination of ISO speed and ISO average gradient subscription-only c) The purchaser needs assurance1 Scope 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