Photography. Black and white continuous tone papers. Determination of ISO speed and ISO range for printing PAS 15 It applies to commercial producers

It applies to commercial producers

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Photography. Black and white continuous tone papers. Determination of ISO speed and ISO range for printing PAS 15 It applies to commercial producers1 Scope This International Standard specifies the method for determining the ISO speed and ISO range of black and white photographic papers used to make positive reflection prints of continuous tone subjects from black and white film negatives. It pertains to all conventional silver halide contact and enlarging papers used for continuous tone or pictorial photography. This includes papers with variable contrast. The papers may be processed in