ISO 10505:2009

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ISO 10505:2009 is a standard that describes a method to measure the root mean square granularity (rms-granularity) of photographic films. It is intended for imaging systems with viewing magnifications between 5x and 12x.

ISO 10505:2009 describes a method for determining the intrinsic root mean square granularity (rms‑granularity) of photographic films. Intrinsic rms-granularity refers to those density fluctuations produced solely by the distribution of developed image forming centres in the photographic emulsion.