1 Scope
This standard is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products.
It specifies a method for the visual comparison of the color of films of paints or related products against a standard (either a reference standard or a freshly prepared standard) using either natural daylight or artificial light sources in a standard booth.
It is not applicable to coatings containing special-effect pigments, e.g. metallics, without previous agreement on all details of illuminating and viewing conditions.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 9271 Paints and Varnishes - Standard Panels for Testing (GB/T 9271-1988, eqv ISO 1514:1984)
GB/T 9278 Temperatures and Humidities for Conditioning and Testing of Paint Specimens (GB/T 9278-2008, ISO 3270:1984, Paints and Varnishes and Their Raw Materials - Temperatures and Humidities for Conditioning and Testing, IDT)
GB/T 11186.1 Methods for Measuring the Color of Paint Films - Part 1: Principles (GB/T 11186.1-1989, eqv ISO 7724-1:1984, Paints and Varnishes - Colorimetry - Part 1: Principles)
GB/T 11186.2 Methods for Measuring the Color of Paint Films - Part 2: Color Measurement (GB/T 11186.2-1989, eqv ISO 7724-2:1984, Paints and Varnishes - Colorimetry - Part 2: Color Measurement)
GB/T 11186.3 Methods for Measuring the Color of Paint Films - Part 3: Calculation of Color Differences (GB/T 11186.3-1989, eqv ISO 7724-3:1984, Paints and Varnishes - Colorimetry - Part 3：Calculation of Color)
GB/T 13452.2 Paints and Varnishes - Determination of Film Thickness (GB/T 13452.2-2008, ISO 2808: 2007, IDT)
CIE 51.2:1999 A Method for Assessing the Quality of Daylight Simulators for Colorimetry
3 Principle
Foreword I
1 Scope
2 Normative References
3 Principle
4 Required Supplementary Information
5 Illumination for Color Matching
6 Observer
7 Test Panels And Reference Standards
8 Procedure for Color Comparison
9 Assessment of Metamerism
10 Test Report
Appendix A (Normative) Required Supplementary Information
Appendix B (Normative) Color Difference Rating Scheme
Appendix C (Informative) Metameric Matches
