In this standard, the tristimulus values and chromaticity coordinates of the standard colorimetric system of International Commission on Illumination CIE 1964 and CIE 1931, or CIE 1976 L*a*b* chroma space or dominant wavelength (complementary wavelength) and excitation purity are used to express the results.
1 Subject Content and Application Scope
This standard specifies the method for measurement of chromaticity for colour building materials.
This standard is applicable to the colorimetric measurement of non-fluorescent colour building materials (e.g. new decorative materials such as ceramic, enamel, paint, glass fiber reinforced plastics, glass, cement and wall paper).
2 Normative References
GB 3977 Specification of Colors
GB 3978 Standard Illuminants and Illuminating-viewing Conditions
GB 3979 Methods for the Measurement of Object Color
GB 5698 Glossary of Color Terms
GB 7921 Uniform Color Space and Color Difference Formula
GB 9087 The White Powdered Standard Plate for Colorimetry and Photometry
GSB A 67001 Material Standard of Magnesium Oxide Whiteness
3 Terms and Symbols
3.1 Chroma
Refers to the color purity or saturation of object.
3.2 Hue value hab
The angle of arctan function of (b*/a*) within 0~360°
1 Subject Content and Application Scope
2 Normative References
3 Terms and Symbols
4 Apparatus
5 Standard White Plate and Working Color Plate
6 Preparation of Sample
7 Measurement
8 Calculation and Expression of Measuring Result
9 Measurement Report
Appendix A CIE 1931 Chromaticity Diagram of Standard Illuminant C Slope of Constant Dominant Wavelength Line (Supplement)
Appendix B CIE 1964 Chromaticity Diagram of Standard Illuminant D65 Slope of Constant Dominant Wavelength Line (Supplement)
Appendix C Chromaticity Coordinate of Spectrum Locus of CIE 1964 Standard Chromaticity Observer (Supplement)
Appendix D Chromaticity Coordinate of Spectrum Locus of CIE 1931 Standard Chromaticity Observer (Supplement)
Appendix E Chromaticity Diagram of CIE 1964 Complementary Chroma System (Supplement)
Appendix F Chromaticity Diagram of CIE 1931 Chroma System (Supplement)
Additional Explanation:
