This document specifies a method for the correct measurement of the colour of finished leather by instrumental means. The document describes general concepts of colour measurement adapted to leather and the calculation of differences in colour. This document defines the following: a) the use of D65 as the standard light source for the leather industry; b) the use of D65 light source 10° as standard conditions for colour matching, for the definition of daylight simulators and as the reference light source for metamerism analysis; c) the use of CIEDE2000 as the colour difference formula.
Tämän julkaisun valmistelusta Suomessa vastaa SFS Suomen Standardit, puh. 09 149 9331.
Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and materials
6 Procedure
6.1 Standardization of colour measuring instrument
6.2 Sampling
6.3 Measuring procedure
7 Method of calculation
7.1 General
7.2 Tristimulus values
7.3 CIE 1976 L*, a*, b*, C*ab and hab
7.4 Calculation of the CIEDE2000 total colour difference formula
8 Test report
Annex A Background to standard procedure for measuring the colour of finished leather (informative)
EN 15987:2015 Leather - Terminology - Key definitions for the leather trade
EN 15987:2022 Leather - Terminology - Key definitions for the leather trade
ISO 11664-3:2012 Colorimetry -- Part 3: CIE tristimulus values
EN 15987:2015 Leather - Terminology - Key definitions for the leather trade
EN 15987:2022 Leather - Terminology - Key definitions for the leather trade
ISO 11664-3:2012 Colorimetry -- Part 3: CIE tristimulus values
ISO 11664-4:2008 Colorimetry -- Part 4: CIE 1976 L*a*b* Colour space
ISO 2419:2012 Leather -- Physical and mechanical tests -- Sample preparation and conditioning
ISO/CIE 11664-6:2014