ASTM E3165-18
(Test Method)Standard Test Method for Nighttime Retroreflected Chromaticity of Retroreflective Sheeting
Standard Test Method for Nighttime Retroreflected Chromaticity of Retroreflective Sheeting
SIGNIFICANCE AND USE
5.1 The results of this test method are used to assess conformance of retroreflective sheeting to the nighttime color requirements of industry standards and government regulations, such as Specification D4956 and U.S. Code of Federal Regulations Title 23 Part 655 Subpart F.
5.2 Requirements in specifications referring to this test method are for the chromaticity of the material as viewed at night. These requirements are generally stated using four or five corner points that form a box that limits the range of acceptable chromaticity. Most of these specifications are categorical in nature; they describe a small range of colors that are recognizable from a color naming or coding purpose
5.3 The method for compliance with the specification is to plot the measured (x, y) values and determine if the measured point falls within the specification box for the color of interest.
SCOPE
1.1 This test method describes the instrumental determination of the nighttime retroreflected chromaticity coordinates of retroreflective sheeting.
1.2 This method includes a procedure based on tristimulus filter colorimetery and a procedure based on spectral measurements.
1.3 A single set of test geometries (using 0.33° observation angle and 5° entrance angle) and apertures are described in this method.
1.4 The resulting chromaticity coordinates are for use with the CIE 1931 chromaticity system utilizing CIE Illuminant A.
1.5 If measurements and calculations are required for other sources of illumination, or geometries, or other materials, the user is referred to the general practice described in Practice E811.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8 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.
General Information
Relations
Standards Content (Sample)
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:E3165 −18
Standard Test Method for
Nighttime Retroreflected Chromaticity of Retroreflective
1
Sheeting
This standard is issued under the fixed designation E3165; 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.
1. Scope 2. Referenced Documents
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1.1 This test method describes the instrumental determina- 2.1 ASTM Standards:
tion of the nighttime retroreflected chromaticity coordinates of D4956 Specification for Retroreflective Sheeting for Traffic
retroreflective sheeting. Control
E284 Terminology of Appearance
1.2 This method includes a procedure based on tristimulus
E308 PracticeforComputingtheColorsofObjectsbyUsing
filter colorimetery and a procedure based on spectral measure-
the CIE System
ments.
E691 Practice for Conducting an Interlaboratory Study to
1.3 A single set of test geometries (using 0.33° observation
Determine the Precision of a Test Method
angle and 5° entrance angle) and apertures are described in this
E808 Practice for Describing Retroreflection
method.
E809 Practice for Measuring Photometric Characteristics of
Retroreflectors
1.4 The resulting chromaticity coordinates are for use with
the CIE 1931 chromaticity system utilizing CIE Illuminant A. E810 Test Method for Coefficient of Retroreflection of
Retroreflective Sheeting Utilizing the Coplanar Geometry
1.5 If measurements and calculations are required for other
E811 Practice for Measuring Colorimetric Characteristics of
sources of illumination, or geometries, or other materials, the
Retroreflectors Under Nighttime Conditions
user is referred to the general practice described in Practice
3
2.2 CIE and ISO Documents:
E811.
CIE Publication 15:2004 Colorimetry
1.6 The values stated in SI units are to be regarded as
CIE Technical Report 54.2 Retroreflection: Definition and
standard. No other units of measurement are included in this
Measurement
standard.
CIETechnicalReport72 GuidetothePropertiesandUsesof
1.7 This standard does not purport to address all of the Retroreflectors at Night
safety concerns, if any, associated with its use. It is the
ISO 11664–1:2007 (CIE S 014–1/E:2006) Colorimetry—
responsibility of the user of this standard to establish appro- Part 1: CIE Standard Colorimetric Observers
priate safety, health, and environmental practices and deter- ISO 11664–2:2007 (CE S 014–2/E:2006) Colorimetry—Part
mine the applicability of regulatory limitations prior to use. 2: CIE Standard Illuminants
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1.8 This international standard was developed in accor- 2.3 U. S. Federal Regulations:
dance with internationally recognized principles on standard- US Code of Federal Regulations (CFR) Title 23: Highways:
ization established in the Decision on Principles for the Part 655—Traffic Operations, Subpart F—Traffic Control
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Barriers to Trade (TBT) Committee.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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AvailablefromU.S.NationalCommitteeoftheCIE(InternationalCommission
1
This test method is under the jurisdiction of ASTM Committee E12 on Color on Illumination), C/o Alan Laird Lewis, 282 E. Riding, Carlisle, MA 01741,
and Appearance and is the direct responsibility of Subcommittee E12.10 on http://www.cie-usnc.org.
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Retroreflection. Available from U.S. Government Printing Office, Superintendent of
Current edition approved July 1, 2018. Published September 2018. DOI: Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
10.1520/E3165-18. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E3165−18
Devices on Federal-Aid and Other Streets and Highways 6. Apparatus
6.1 The apparatus consists of a light source, a receptor
3. Terminology
(tristimulus or spectral) and the geometric arrangement (either
in a photometric range or an optically-reduced design for
3.1 The terms and definitions inTerminology E284 apply to
laboratory bench or field use).
this test method.
6.2 The light source shall closely approximate the spectral
3.2 Definitions:
distributionofCIEIlluminantA(acorrelatedcolortemperature
3.2.1 chromaticity coordinates,
...
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