AS/NZS 1301.455S:1993

1 - AS/NZS 1301.455s:1993 COLOUR MEASUREMENT WITH A DIFF/0 deg GEOMETRY TRISTIMULUS REFLECTOMETER
1 - PREFACE
1 - FOREWORD
1 - 1. SCOPE
2 - 2. REFERENCED DOCUMENTS
2 - 3. DEFINITIONS
2 - 3.1 Reflectance factor,
2 - 3.2 Intrinsic reflectance factor,
2 - 3.3 CIE tristimulus values
2 - 3.4 1976 CIELAB colour space
2 - 4. PRINCIPLE
2 - 5. APPARATUS
2 - 5.1 Reflectometer or abridged spectrophotometer
2 - 5.2 ISO reference standards
2 - 6. SAMPLING AND SAMPLE PREPARATION
3 - 7. PROCEDURE
3 - 8. CALCULATIONS
3 - 9. TEST REPORT
4 - 10. REFERENCES
5 - APPENDIX A
5 - A1 CIELAB colour space
5 - A2 Dominant wavelength, excitation purity and Y

This Standard has been revised to include formulae for the calculation of CIELAB values from measured tristimulus values. The revision also includes additional background information on colour measurement, restricts the illuminants to CIE illuminants D(sub)65(/sub) or C, clarifies the calibration requirements and adds a new reference which gives basic information about colour and its measurement.

This Standard specifies a method for measuring the colour of paper and board by using diffuse illumination and measuring the light reflected at right angles to the surface. It is confined to non-fluorescent papers and boards.

First published March 1991 Revised as Joint Standard 1993