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ISO/TS 20791-2:2021

Photography — Photographic reflection prints — Part 2: Evaluation of colour variation in printing

General information
Valid from 20.10.2021
Directives or regulations
None
Standard history
Status
Date
Type
Name
20.10.2021
Main
This document describes the procedures for evaluation of colour variation in the printing of photographic reflection colour prints. The following procedures are described to evaluate colour variation in printing within a consecutive print job, between several print jobs, or between multiple photographic images printed in different areas of a large sheet: a) test targets for small and large photographic prints; b) printing procedures and conditions; c) sampling in correspondence to the production scale; d) measurement of colour; e) calculation and analysis of colour variation and f) reporting. The procedures presented in this document are applicable for prints with a size of available picture area ranging from 35 cm2 (e.g. 5 cm × 7 cm) to 5 400 cm2 (e.g. 60 cm × 90 cm). This document is applicable to any of the photographic printing technologies, including inkjet, thermal dye transfer, electrophotography and silver halide (chromogenic) technologies.
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