ASTM E1347-06(2015)
Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry

Standard No.

ASTM E1347-06(2015)

Release Date

2006

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E1347-06(2020)

Latest

ASTM E1347-06(2020)

Scope

5.1 The most direct and accessible methods for obtaining the color differences and color coordinates of object colors are by instrumental measurement using colorimeters or spectrophotometers with either hemispherical or bidirectional optical measuring systems. This test method provides procedures for such measurement by use of a colorimeter with either a bidirectional or a hemispherical optical measuring system.

5.2 This test method is suitable for measurement of color differences of nonmetameric, nonparameric pairs of object-color specimens, or color coordinates of most such specimens. A further limitation to the use of colorimeters having hemispherical geometry is the existence of a chromatic integrating-sphere error that prevents accurate measurement of color coordinates when the colorimeter is standardized by use of a white standard.4

5.3 For the measurement of retroreflective specimens by this test method, the use of bidirectional geometry is recommended (See Guide E179 and Practice E805).

Note 3: To ensure inter-instrument agreement in the measurement of retroreflective specimens, significantly tighter tolerances than those given in Practice E1164 in the section on Influx and Efflux Conditions for 45°:Normal (45:0) and Normal:45° (0:45) Reflectance Factor are required for the instrument angles of illumination and viewing. Information on the required tolerances is being developed.

5.4 A requirement for the use of a colorimeter to obtain accurate color coordinates is that the combination of source, filter, and detector characteristics to duplicate accurately the combined characteristics of a CIE standard illuminant and observer. When this requirement is not met, this test method requires the use of local standards for improving accuracy in the measurement of color coordinates (see also 4.2). For the measurement of small color differences between nonmetameric, nonparameric specimens, accuracy in absolute color coordinates is less important and standardization of the colorimeter by use of a white standard is satisfactory. However, accurate color-difference measurement requires that specimen pairs have similar spectral and geometric characteristics.

1.1 This test method covers the instrumental measurement of specimens resulting in color coordinates and color difference values by using a tristimulus colorimeter, also known as a tristimulus filter colorimeter or a color-difference meter.

1.2 Provision is made in this test method for the measurement of color coordinates and color differences by reflected or transmitted light using either a hemispherical optical measuring system, such as an integrating sphere, or a bidirectional optical measuring system, such as annular, circumferential, or uniplanar 45:0 and 0:45 geometry.

1.3 Because of the limited absolute accuracy of tristimulus colorimeters, this test method specifies that, when c......

ASTM E1347-06(2015) Referenced Document

• ASTM D2244 Standard Test Method for Calculation of Color Differences From Instrumentally Measured Color Coordinates
• ASTM E1164 Standard Practice for Obtaining Spectrophotometric Data for Object-Color Evaluation
• ASTM E1345 Standard Practice for Reducing the Effect of Variability of Color Measurement by Use of Multiple Measurements
• ASTM E179 Standard Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials
• ASTM E284 Standard Terminology of Appearance
• ASTM E805 Standard Practice for Identification of Instrumental Methods of Color or Color-Difference Measurement of Materials

ASTM E1347-06(2015) history

• 2020 ASTM E1347-06(2020) Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
• 2006 ASTM E1347-06(2015) Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
• 2006 ASTM E1347-06(2011) Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
• 2006 ASTM E1347-06 Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
• 2003 ASTM E1347-03 Standard Test Method for Color and Color-Difference Measurement by Tristimulus (Filter) Colorimetry
• 1997 ASTM E1347-97 Standard Test Method for Color and Color-Difference Measurement by Tristimulus (Filter) Colorimetry