ISO 3664:2025

Graphic technology and photography — Viewing conditions Published (Edition 4, 2025)

Abstract

This document specifies viewing conditions for images on both reflective and transmissive media, such as prints (both photographic and photomechanical) and transparencies.

This document applies to

—     critical evaluation of and comparison between transparencies, backlighted signs, reflection photographic or photomechanical prints and/or a reference object or image,

—     appraisal of the tone reproduction and colourfulness of prints and transparencies at illumination levels similar to those for practical use, including routine inspection, and

—     critical appraisal of transparencies which are viewed by projection, for comparison with prints, objects, or other reproductions.

This document is not applicable to soft-proofing displays, for paper manufacture, and other applications outside of graphic technology and photography.