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ASTM-E1349:2006 Edition(Redline)

ASTM-E1349:2006 Edition(Redline)

$23.40

E1349-06 Standard Test Method for Reflectance Factor and Color by Spectrophotometry Using Bidirectional (45:0 or 0:45) Geometry (Redline)

Published By Publication Date Number of Pages
ASTM 2006 5
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Significance and Use

The most direct and accessible methods for obtaining the color coordinates of object colors are by instrumental measurement using spectrophotometers or spectrocolorimeters with either hemispherical or bidirectional optical measuring systems. This test method provides procedures for such measurement by spectrophotometry using a bidirectional (0:45 or 45:0) optical measuring system. The method for color and color difference measurement using filter colorimeters is contained in Test Method E 1347.

This test method is especially suitable for measurement of the following types of specimens for the indicated uses (see also Guide E 179 and Practice E 805):

5.2.1 Object-color specimens of any gloss level for color assessment.

5.2.2 Object-color specimens with physically flat, smooth surfaces from which to obtain data for use in computer colorant formulation.

5.2.3 Retroreflective specimens.

Note 1—To ensure inter-instrument agreement in the measurement of specimens with intermediate gloss, for formulation, or of retroreflective specimens, significantly tighter tolerances than those given in Practice E 1164, Influx and Efflux Conditions, 45 ° :Normal (45:0) and Normal:45 ° (0:45) Reflectance Factor section, may be required for the instrument angles of illumination and viewing. Information on the required tolerances is being developed.

This test method is not recommended for measurement of specimens with bare metal surfaces for color assessment, for which the use of hemispherical measurement geometry, as with an integrating-sphere type instrument, is preferable (see Guide E 179).

1. Scope

1.1 This test method covers the instrumental measurement of the reflection properties and color of object-color specimens by use of a spectrophotometer or spectrocolorimeter with a bidirectional optical measuring system, such as annular, circumferential, or uniplanar 45:0 or 0:45 geometry.

1.2 This test method is generally suitable for any non-fluorescent, flat object-color specimen. It is especially recommended for measuring retroreflective specimens and specimens of intermediate gloss.

1.3 Procedures required for the measurement of fluorescent object color are given in Practice E 991 and Practice E 2153.

1.4 Procedures required for the measurement of color using filter colorimeters are contained in Test Method E 1347 and this standard does not address those instruments.

. This standard does not purport to address all of 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.

ASTM Standards

D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates E179 Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials E284 Terminology of Appearance E308 Practice for Computing the Colors of Objects by Using the CIE System E694 Specification for Laboratory Glass Volumetric Apparatus E805 Practice for Identification of Instrumental Methods of Color or Color-Difference Measurement of Materials E991 Practice for Color Measurement of Fluorescent Specimens Using the One-Monochromator Method E1164 Practice for Obtaining Spectrometric Data for Object-Color Evaluation E1345 Practice for Reducing the Effect of Variability of Color Measurement by Use of Multiple Measurements E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry 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 E2214 Practice for Specifying and Verifying the Performance of Color-Measuring Instruments

Keywords

bidirectional geometry; color; reflectance; spectrophotometer;

ICS Code

ICS Number Code 17.180.20 (Colours and measurement of light)

DOI: 10.1520/E1349-06 ASTM International is a member of CrossRef.

Citing ASTM Standards

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