ASTM D5382-02(2017)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5382 − 02 (Reapproved 2017)
Standard Guide to
Evaluation of Optical Properties of Powder Coatings
This standard is issued under the fixed designation D5382; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
The term optical properties of powder coatings refers to those properties associated with the
interaction of visible light with the coatings. These properties include, but are not limited to, color,
color difference, gloss, and metamerism. Coating powder users and producers may sometimes be
overwhelmed by the sheer number of standard practices and standard test methods available for the
evaluation of the optical properties of the finished coatings.
This guide is intended to lead the user to each of the practices and test methods needed, once the
user decides whether the evaluation is to be by visible means or by instrumental means. Further, the
user must decide which of the several optical properties mentioned above are to be evaluated. This
guide will lead the user to the applicable practices and test methods for the properties chosen by the
means selected.
1. Scope D1729 Practice for Visual Appraisal of Colors and Color
Differences of Diffusely-Illuminated Opaque Materials
1.1 This standard provides the user with a guide to the
D2244 Practice for Calculation of Color Tolerances and
various available practices and test methods for the evaluation
Color Differences from Instrumentally Measured Color
of color, color difference, gloss, and metamerism by both
Coordinates
visual and by instrumental means.
D2616 Test Method for Evaluation of Visual Color Differ-
1.2 This standard does not purport to address all of the
ence With a Gray Scale
safety concerns, if any, associated with its use. It is the
D3134 Practice for Establishing Color and Gloss Tolerances
responsibility of the user of this standard to establish appro-
D4039 Test Method for Reflection Haze of High-Gloss
priate safety and health practices and determine the applica-
Surfaces
bility of regulatory limitations prior to use.
D4086 Practice for Visual Evaluation of Metamerism
1.3 This international standard was developed in accor-
D4449 Test Method for Visual Evaluation of Gloss Differ-
dance with internationally recognized principles on standard-
ences Between Surfaces of Similar Appearance
ization established in the Decision on Principles for the
D5767 Test Methods for Instrumental Measurement of
Development of International Standards, Guides and Recom-
Distinctness-of-Image Gloss of Coating Surfaces
mendations issued by the World Trade Organization Technical
E284 Terminology of Appearance
Barriers to Trade (TBT) Committee.
E308 PracticeforComputingtheColorsofObjectsbyUsing
the CIE System
2. Referenced Documents
E430 TestMethodsforMeasurementofGlossofHigh-Gloss
2.1 ASTM Standards:
Surfaces by Abridged Goniophotometry
D523 Test Method for Specular Gloss
E1247 Practice for Detecting Fluorescence in Object-Color
D1535 Practice for Specifying Color by the Munsell System
Specimens by Spectrophotometry
E1331 Test Method for Reflectance Factor and Color by
This guide is under the jurisdiction of ASTM Committee D01 on Paint and Spectrophotometry Using Hemispherical Geometry
Related Coatings, Materials, and Applications and is the direct responsibility of
E1345 Practice for Reducing the Effect of Variability of
Subcommittee D01.51 on Powder Coatings.
Color Measurement by Use of Multiple Measurements
Current edition approved June 1, 2017. Published June 2017. Originally
E1347 Test Method for Color and Color-Difference Mea-
approved in 1993. Last previous edition approved in 2013 as D5382 – 02 (2013).
DOI: 10.1520/D5382-02R17.
surement by Tristimulus Colorimetry
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
E1349 Test Method for Reflectance Factor and Color by
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Spectrophotometry Using Bidirectional (45°:0° or 0°:45°)
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Geometry
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D5382 − 02 (2017)
E1360 Practice for Specifying Color by Using the Optical 4.2 Color—To obtain the color notation of a specimen in the
Society of America Uniform Color Scales System Munsell Color Order System use Practice D1535.To obtain the
E1541 Practice for Specifying and Matching Color Using color notation of a specimen in the Optical Society ofAmerica
the Colorcurve System (Withdrawn 2007) Uniform Color System use Practice E1360. To obtain the color
notation of a specimen in the Colorcurve System use Practice
3. Terminology
E1541.
3.1 The definitions in Terminology E284 are applicable to
4.3 Color Difference—Practice D1729 will provide visual
the appearance terms used in this standard. The following
color difference in descriptive terms. If it is desirable to
terms from Terminology E284 are specific to t
...