ASTM E2366-05
(Test Method)Standard Test Method for Measurement of Daytime Chromaticity of Pavement Marking Materials Using a Portable Reflection Colorimeter (Withdrawn 2014)
Standard Test Method for Measurement of Daytime Chromaticity of Pavement Marking Materials Using a Portable Reflection Colorimeter (Withdrawn 2014)
SIGNIFICANCE AND USE
The chromaticity of the stripe is determined by means of the tristimulus values X, Y and Z for the CIE 1931 (2°) standard observer for CIE Standard Illuminant D65, which are converted to the chromaticity coordinates (x, y) and shown in the CIE 1931 (x, y)-chromaticity diagram. Refer to Practice E 308.
Under the same conditions of illumination and viewing, the chromaticity coordinates (x, y) represent the daytime color of pavement markings in daylight illumination as seen by drivers of the vehicles.
The chromaticity of pavement (road) markings may change with traffic wear and require periodic measurement to ensure that the chromaticity is maintained within boundaries (see Specification D 6628 for examples of color boundaries).
As specified by CEN, the measurement geometry of the instrument is based on a viewing distance of 30 m and an eye height of 1.2 m.
It shall be the responsibility of the user to employ an instrument having the specified illumination and co-viewing angle.
SCOPE
1.1 This test method covers measurement of the daytime chromaticity coordinates (x, y) of horizontal pavement markings, such as traffic stripes and surface symbols, and pavement surfaces under diffuse illumination, using a portable reflection colorimeter that can be placed on the surface to measure the chromaticity in a particular viewing direction.
1.2 The co-viewing angle of the reflection colorimeter affects the readings. As specified by the European Committee for Standardization (CEN EN 1436), the co-viewing angle shall be 2.29.
1.3 This test method is intended to be used for field measurement of pavement markings but may be used to measure the chromaticity and the luminance coefficient under diffuse illumination of materials on sample panels before placing the marking material in the field.
1.4 The portable reflection colorimeter may integrate measurement of the luminance coefficient under diffuse illumination Qd according to Test Method E 2302 and thus be an integrated reflectometer/reflection colorimeter.
1.5 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.
WITHDRAWN RATIONALE
This test method covers measurement of the daytime chromaticity coordinates (x, y) of horizontal pavement markings, such as traffic stripes and surface symbols, and pavement surfaces under diffuse illumination, using a portable reflection colorimeter that can be placed on the surface to measure the chromaticity in a particular viewing direction.
Formerly under the jurisdiction of Committee E12 on Color and Appearance, this test method was withdrawn in January 2014 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E2366 −05
StandardTest Method for
Measurement of Daytime Chromaticity of Pavement Marking
Materials Using a Portable Reflection Colorimeter
This standard is issued under the fixed designation E2366; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E811Practice for Measuring Colorimetric Characteristics of
Retroreflectors Under Nighttime Conditions
1.1 This test method covers measurement of the daytime
E2302Test Method for Measurement of the Luminance
chromaticity coordinates (x, y) of horizontal pavement
Coefficient Under Diffuse Illumination of Pavement
markings, such as traffic stripes and surface symbols, and
Marking Materials Using a Portable Reflectometer
pavement surfaces under diffuse illumination, using a portable
2.2 Other Standard:
reflection colorimeter that can be placed on the surface to
CEN EN 1436Road Marking Materials—Road Marking
measure the chromaticity in a particular viewing direction.
Performance for Road Users
1.2 The co-viewing angle of the reflection colorimeter
affects the readings. As specified by the European Committee
3. Terminology
for Standardization (CEN EN 1436), the co-viewing angle
3.1 The terminology used in this test method generally
shall be 2.29°.
agrees with that used in Terminology E284. The definitions
1.3 This test method is intended to be used for field
given in Test Method E2302 and Practice E811 apply in this
measurement of pavement markings but may be used to
test method as well.
measure the chromaticity and the luminance coefficient under
3.2 Definitions:
diffuse illumination of materials on sample panels before
3.2.1 reflection colorimeter, n—an instrument that illumi-
placing the marking material in the field.
nates a specimen and applies a colorimeter to the light
1.4 The portable reflection colorimeter may integrate mea-
reflected.
surement of the luminance coefficient under diffuse illumina-
tion Qd according to Test Method E2302 and thus be an
4. Summary of Test Method
integrated reflectometer/reflection colorimeter.
4.1 This test method involves the use of portable reflection
1.5 This standard does not purport to address all of the
colorimeters for determining the chromaticity coordinates (x,
safety concerns, if any, associated with its use. It is the
y) of horizontal coatings materials used in pavement markings,
responsibility of the user of this standard to establish appro-
and of pavement surfaces.
priate safety and health practices and determine the applica-
4.2 Illumination is diffuse and the co-viewing angle is fixed
bility of regulatory limitations prior to use.
at 2.29°.
2. Referenced Documents
4.3 The reflection colorimeters use one or more external
2.1 ASTM Standards: panels or other instrument standards of known chromaticity
D6628Specification for Color of Pavement Marking Mate-
coordinates (x, y), or known spectral reflectance factor.
rials
4.4 The portable reflection colorimeter’s illuminator is
E284Terminology of Appearance
placed directly over the pavement marking to be measured,
E308PracticeforComputingtheColorsofObjectsbyUsing
ensuring that the measurement area of the reflection colorim-
the CIE System
eter fits within the width of the stripe, and the readings
displayed by the reflection colorimeter are recorded.
This test method is under the jurisdiction of ASTM Committee E12 on Color
4.5 Readings shall be taken for the direction of traffic.
and Appearance and is the direct responsibility of Subcommittee E12.10 on
Retroreflection.
Readings shall be taken for each direction of traffic separately
Current edition approved Jan. 1, 2005. Published February 2005. DOI: 10.1520/
for centerlines.
E2366-05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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 Available from European Committee for Standardization, Central Secretariat
the ASTM website. (CEN), rue de Stassart 36, B1050 Brussels, Belgium.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E2366−05
5. Significance and Use combinedspectraldistributionofCIEStandardIlluminantD65
and the CIE 1931 (2°) x(λ), y(λ) and z(λ) color-matching
5.1 Thechromaticityofthestripeisdeterminedbymeansof
functions, respectively. The x(λ) function has two distinct
thetristimulusvalues X, Yand ZfortheCIE1931(2°)standard
lobes.Thismaybedealtwithbysplitting x(λ)into x (λ)and
short
observer for CIE Standard Illuminant D65, which are con-
x (λ),eachwithaseparatefilter.Thefiltersmaybemanually
long
verted to the chromaticity coordinates (x, y) and shown in the
or automatically operated.
CIE 1931 (x, y)-chromaticity diagram. Refer to Practice E308.
6.3.2.2 A spectrocolorimeter may measure the spectral re-
5.2 Under the same conditions of illumination and viewing,
flectance in equal wavelength steps covering at least the
the chromaticity coordinates (x, y) represent the daytime color
wavelength range from 400 to 700 nm, with a maximum half
of pavement markings in daylight illumination as seen by
power bandwidth of 10 nm in maximum step increment of 10
drivers of the vehicles.
nm and from these data derive X, Y and Z tristimulus values.
5.3 The chromaticity of pavement (road) markings may
NOTE 1—Use of filters provides larger signals than measurement of the
change with traffic wear and require periodic measurement to
spectral distribution.
ensure that the chromaticity is maintained within boundaries
6.3.3 The colorimeter shall be able to determine the chro-
(see Specification D6628 for examples of color boundaries).
maticity coordinates (x, y) for CIE D65 and the CIE 1931
5.4 As specified by CEN, the measurement geometry of the
Observerofwhiteandyellowpavementmarkingswithavalue
instrument is based on a viewing distance of 30 m and an eye
of the luminance coefficient under diffuse illumination Qd of
height of 1.2 m. -2 -1
80 mcd·m ·lx , or higher, with a minimum reproducibility
5.5 It shall be the responsibility of the user to employ an 0.005, when calibrated and used according to the instrument
instrument having the specified illumination and co-viewing manufacturers instructions.
angle.
6.3.4 The colorimeter shall comply with requirements of
Test Method E2302, Receiver Requirements sections concern-
6. Apparatus ing respectively receiver aperture, combined stability of the
output of the light source and receiver, and linearity.
6.1 Portable Reflection Colorimeter :
6.1.1 The reflection colorimeter shall be portable, with the
6.4 Measurement Geometry:
capability to be placed on various horizontal pavement mark-
6.4.1 The measurement geometry shall comply with re-
ings in different locations.
quirements of Test Method E2302, Measurement Geometry
6.1.2 The reflection colorimeter shall be constructed so that
section.
placement on the highway pavement markings will preclude
anystraylightenteringthemeasurementareaoftheinstrument
7. Standardization and Procedure
and affecting the reading. This may be done by shielding
7.1 The instrument will either require an external black
against stray light, or by subtraction of the stray light reading,
standard or it will incorporate an internal black standard or
or both.
some other internal means of zeroing.
6.1.3 For the convenience of the user, a marking shall be
7.1.1 If the instrument standardization requires a black
placed on the instrument to permit it to be aligned with the
standard then the black standard shall have virtually no
directionoftraffic,ortheinstrumentdesignshallitselfindicate
reflection over the range of wavelengths for the visible part of
the measuring direction in an obvious manner.
thespectrum.Theblackstandardmaybealighttrapformedas
6.2 Illumination System Requirements :
a wedge of two black acrylic plates. For some instruments, the
6.2.1 The illumination system shall comply with require-
black standard may be an unobstructed free path obtained by a
ments of Test Method E2302, section on Illumination System
lift or a tilt of the instrument.
Requirements.
7.2 A portable instrument with a tristimulus colorimeter,
6.3 Colorimeter Requirements:
refer to 6.3.2, can be calibrated using a black standard (if
6.3.1 The colorimeter shall have sufficient sensitivity and
required) and one, two, three or more instrument standards
range to accommodate values expected in use, such as pre-
consisting of separate panels or other instruments standards.
sented by a range of the luminance coefficient under diffuse
7.2.1 The ins
...
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