Foreword

Introduction

1Scope

2Normative references

3Terms and definitions

4Test conditions

4.1General

4.2Test room

4.3Working area

4.4Lighting

4.4.1General

4.4.2Natural daylight illumination

4.4.3Artificial daylight illumination

4.4.4Other artificial sources

4.5Illuminance

4.6Geometric conditions for illumination and viewing

4.6.1Opaque or translucent samples

4.6.2Transparent or clear liquids

4.7Assessors

4.7.1Recruitment and selection of assessors

4.7.2Training

4.7.3Sensory adaptation and fatigue

5Test method

5.1Principle

5.2Reference materials (colour standards)

5.3Apparatus

5.4Test samples

5.5Procedure

5.5.1Preparation of samples

5.5.1.1Dry powdered samples (particle size less than 1 mm)

5.5.1.2Opaque solid samples

5.5.1.3Opaque liquid samples

5.5.2Evaluation of colour by comparison

5.5.2.1General

5.5.2.2Opaque powder samples

5.5.2.3Opaque solids and flat matt surface samples

5.5.2.4Opaque solids with glossy irregular surface

5.5.2.5Opaque solids with glossy regular surface

5.5.2.6Opaque samples with non-uniform colour

5.5.2.7Opaque, translucent and cloudy liquid samples

5.5.2.8Clear liquid samples

6Expression of results

7Test report

Annex AMetameric matches (informative)

Annex BViewing arrangements (informative)

B.1Example of viewing box for colour comparisons

B.2Relative positions of illuminant, sample and assessor

B.2.145°/0° Geometry

B.2.20°/45º Geometry

B.3Relative position of sample, illuminant and assessor

Annex CComplementary information (informative)

Bibliography