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Significance and Use
The most general and reliable methods for obtaining CIE tristimulus values or, through transformation of them, other coordinates for describing the colors of objects are by the use of spectrometric data. Colorimetric data are obtained by combining object spectral data with data representing a CIE standard observer and a CIE standard illuminant, as described in Practice E308.
This practice provides procedures for selecting the operating parameters of spectrometers used for providing data of the desired precision. It also provides for instrument calibration by means of material standards, and for selection of suitable specimens for obtaining precision in the measurements.
1.1 This practice covers the instrumental measurement requirements, calibration procedures, and material standards needed to obtain precise spectral data for computing the colors of objects.
1.2 This practice lists the parameters that must be specified when spectrometric measurements are required in specific methods, practices, or specifications.
1.3 Most sections of this practice apply to both spectrometers, which can produce spectral data as output, and spectrocolorimeters, which are similar in principle but can produce only colorimetric data as output. Exceptions to this applicability are noted.
1.4 This practice is limited in scope to spectrometers and spectrometric colorimeters that employ only a single monochromator. This practice is general as to the materials to be characterized for color.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1003 Test Method for Haze and Luminous Transmittance of Transparent Plastics
E179 Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials
E259 Practice for Preparation of Pressed Powder White Reflectance Factor Transfer Standards for Hemispherical and Bi-Directional Geometries
E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
E284 Terminology of Appearance
E308 Practice for Computing the Colors of Objects by Using the CIE System
E387 Test Method for Estimating Stray Radiant Power Ratio of Dispersive Spectrophotometers by the Opaque Filter Method
E805 Practice for Identification of Instrumental Methods of Color or Color-Difference Measurement of Materials
E925 Practice for Monitoring the Calibration of Ultraviolet-Visible Spectrophotometers whose Spectral Bandwidth does not Exceed 2 nm
E958 Practice for Measuring Practical Spectral Bandwidth of Ultraviolet-Visible Spectrophotometers
E991 Practice for Color Measurement of Fluorescent Specimens Using the One-Monochromator Method
E1767 Practice for Specifying the Geometries of Observation and Measurement to Characterize the Appearance of Materials
E2153 Practice for Obtaining Bispectral Photometric Data for Evaluation of Fluorescent Color
E2194 Practice for Multiangle Color Measurement of Metal Flake Pigmented Materials
NIST PublicationsSP-692 Transmittance MAP Service
CIE PublicationsCIE No. 130 Practical Applications of Reflectance and Transmittance Measurements
ISO PublicationsISO 2469 Paper, Board and Pulps Measurement of Diffuse Reflectance Factor Available from International Organization for Standardization (ISO), 1 rue de Varemb, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
ISCC PublicationsTechnical Report 2003-1 Guide to Material Standards and Their Use in Color Measurement
ICS Number Code 17.180.20 (Colours and measurement of light)
ASTM E1164-12, Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation , ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top