ASTM_E_2366_-_05.pdf

Designation:E 2366 05Standard Test Method forMeasurement of Daytime Chromaticity of Pavement MarkingMaterials Using a Portable Reflection Colorimeter1This standard is issued under the fixed designation E 2366;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers measurement of the daytimechromaticity coordinates(x,y)of horizontal pavement mark-ings,such as traffic stripes and surface symbols,and pavementsurfaces under diffuse illumination,using a portable reflectioncolorimeter that can be placed on the surface to measure thechromaticity in a particular viewing direction.1.2 The co-viewing angle of the reflection colorimeteraffects the readings.As specified by the European Committeefor Standardization(CEN EN 1436),the co-viewing angleshall be 2.29.1.3 This test method is intended to be used for fieldmeasurement of pavement markings but may be used tomeasure the chromaticity and the luminance coefficient underdiffuse illumination of materials on sample panels beforeplacing the marking material in the field.1.4 The portable reflection colorimeter may integrate mea-surement of the luminance coefficient under diffuse illumina-tion Qd according to Test Method E 2302 and thus be anintegrated reflectometer/reflection colorimeter.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D 6628 Specification for Color of Pavement Marking Ma-terialsE 284 Terminology of AppearanceE 308 Practice for Computing Colors of Objects by usingthe CIE SystemE 811 Practice for Measuring Colorimetric Characteristicsof Retroreflectors under Nighttime ConditionsE 2302 Test Method for Measurement of the LuminanceCoefficient under Diffuse Illumination of Pavement Mark-ing Materials with CEN-Prescribed Geometry Using aPortable Reflectometer2.2Other Standard:CEN EN 1436 Road Marking MaterialsRoad MarkingPerformance for Road Users33.Terminology3.1 The terminology used in this test method generallyagrees with that used in Terminology E 284.The definitionsgiven in Test Method E 2302 and Practice E 811 apply in thistest method as well.3.2 Definitions:3.2.1 reflection colorimeter,nan instrument that illumi-nates a specimen and applies a colorimeter to the lightreflected.4.Summary of Test Method4.1 This test method involves the use of portable reflectioncolorimeters for determining the chromaticity coordinates(x,y)of horizontal coatings materials used in pavement markings,and of pavement surfaces.4.2 Illumination is diffuse and the co-viewing angle is fixedat 2.29.4.3 The reflection colorimeters use one or more externalpanels or other instrument standards of known chromaticitycoordinates(x,y),or known spectral reflectance factor.4.4 The portable reflection colorimeters illuminator isplaced directly over the pavement marking to be measured,ensuring that the measurement area of the reflection colorim-eter fits within the width of the stripe,and the readingsdisplayed by the reflection colorimeter are recorded.4.5 Readings shall be taken for the direction of traffic.Readings shall be taken for each direction of traffic separatelyfor centerlines.5.Significance and Use5.1 The chromaticity of the stripe is determined by means ofthe tristimulus values X,Y and Z for the CIE 1931(2)standard1This test method is under the jurisdiction of ASTM Committee E12 on Colorand Appearance and is the direct responsibility of Subcommittee E12.10 onRetroreflection.Current edition approved Jan.1,2005.Published February 2005.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from European Committee for Standardization,Central Secretariat(CEN),rue de Stassart 36,B1050 Brussels,Belgium.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.observer for CIE Standard Illuminant D65,which are con-verted to the chromaticity coordinates(x,y)and shown in theCIE 1931(x,y)-chromaticity diagram.Refer to Practice E 308.5.2 Under the same conditions of illumination and viewing,the chromaticity coordinates(x,y)represent the daytime colorof pavement markings in daylight illumination as seen bydrivers of the vehicles.5.3 The chromaticity of pavement(road)markings maychange with traffic wear and require periodic measurement toensure that the chromaticity is maintained within boundaries(see Specification D 6628