ISO 10505-2009 PDF

Full title and description

ISO 10505:2009 — Photography — Root mean square granularity of photographic films — Method of measurement. This International Standard specifies a photometric method for determining the intrinsic root mean square (rms) granularity of continuous‑tone photographic films (monochrome and colour) coated on a transmitting support.

Abstract

ISO 10505:2009 defines the procedure to measure intrinsic rms‑granularity (density fluctuations arising from the distribution of developed image‑forming centres in the emulsion). It is applicable to continuous‑tone monochrome (silver) and colour (dye) materials on transmitting supports and is intended for imaging systems viewed at magnifications between about 5× and 12×. The standard excludes reflecting materials (photographic papers), double‑coated emulsions and estimation of the noise power spectrum (Wiener spectrum).

General information

• Status: Published (International Standard; confirmed at review).
• Publication date: May 2009 (2009‑05).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 37.040.20 (Photographic paper, films and plates).
• Edition / version: Edition 1 (2009).
• Number of pages: 24 pages.

Scope

Specifies a laboratory measurement method for the intrinsic root mean square granularity of photographic films used in continuous‑tone imaging. The procedure applies to transmissive film materials (monochrome and colour) and is targeted at typical viewing magnifications (approximately 5×–12×). The standard does not cover paper‑based reflecting materials, films with emulsions on both sides, nor calculation of the noise power spectrum.

Key topics and requirements

• Definition of intrinsic rms‑granularity and its photometric significance.
• Specification of measurement geometry and viewing magnification (recommended 5×–12×).
• Details of instrumentation, sample preparation and measurement procedure for transmissive films.
• Limitations and exclusions (reflective papers, double‑coated emulsions, Wiener noise power spectrum).
• Reporting requirements for measured granularity values and test conditions.

Typical use and users

Used by photographic materials manufacturers, imaging laboratories, research groups and quality control personnel who need standardized granularity measurements for film production, material comparison or product specifications. It is also used by testing laboratories and standards bodies involved in imaging‑performance evaluation.

Related standards

ISO 10505:2009 is published under ISO/TC 42 (Photography) and sits alongside other photography and imaging standards that address resolution, noise, speed and image quality (for example ISO 12233, ISO 12232, ISO 15739 and archival/imaging guidance standards maintained by ISO/TC 42). These related standards cover complementary measurements such as spatial resolution, speed rating and noise/dynamic range.

Keywords

rms granularity; root mean square granularity; photographic film; film granularity; intrinsic granularity; measurement method; ISO/TC 42; imaging standards; transmissive film.

FAQ

Q: What is this standard?

A: ISO 10505:2009 is an International Standard that specifies a method to measure the intrinsic root mean square (rms) granularity of continuous‑tone photographic films (transmissive monochrome and colour).

Q: What does it cover?

A: It covers laboratory measurement procedures, instrumentation and reporting for intrinsic rms‑granularity of photographic films viewed at typical magnifications (about 5×–12×). It excludes reflecting papers, double‑coated emulsions and computation of the noise power (Wiener) spectrum.

Q: Who typically uses it?

A: Film manufacturers, testing and quality control laboratories, imaging researchers and standards organizations that require a reproducible method to quantify film granularity.

Q: Is it current or superseded?

A: The publication date is May 2009 (Edition 1). The ISO bibliographic record shows the standard was reviewed and confirmed at periodic reviews (confirmed as current through the ISO systematic review process). Users should check the ISO catalogue for any later amendments or a newer edition before relying on the standard for procurement or certification.

Q: Is it part of a series?

A: It is part of the body of photography and imaging standards developed under ISO/TC 42 rather than a numerically linked “series” of ISO 105xx textile standards. Related imaging measurement standards (resolution, speed, noise) are published separately under ISO/TC 42.

Q: What are the key keywords?

A: rms granularity; intrinsic granularity; photographic film; transmissive film measurement; imaging standards; ISO/TC 42.