1、Designation: D6628 16Standard Specification forColor of Pavement Marking Materials1This standard is issued under the fixed designation D6628; 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 pa
2、rentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the daytime and nighttimecolor of retroreflective pavement marking materials used fortraffic control lane markings and sy
3、mbols on road surfaces. Itis intended to apply throughout the service life of the material.1.2 This specification applies to both painted and tape lines,including thermoplastic, epoxy and other types.1.3 This specification is not applicable to the testing, forquality control purposes, of marking mat
4、erial without addeddrop-on beads.1.4 In addition, it does not describe requirements other thancolor such as retroreflectance.1.5 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.5.1 ExceptionThis specification is noted to be a
5、SIdocument, where angles are generally expressed in radians.However, as angles used in retroreflection have historicallybeen identified in degrees, the International Committee forWeights and Measures (CIPM, Comit International des Poidset Mesures) accepts the use of degrees with SI units, andEuropea
6、n Normatives and documents from the InternationalCommission on Illumination (CIE) use degrees for retroreflec-tion geometry.2. Referenced Documents2.1 ASTM Standards:2D4061 Test Method for Retroreflectance of Horizontal Coat-ingsD7585/D7585M Practice for Evaluating RetroreflectivePavement Markings U
7、sing Portable Hand-Operated In-strumentsE284 Terminology of AppearanceE308 Practice for Computing the Colors of Objects by Usingthe CIE SystemE811 Practice for Measuring Colorimetric Characteristics ofRetroreflectors Under Nighttime ConditionsE1349 Test Method for Reflectance Factor and Color bySpec
8、trophotometry Using Bidirectional (45:0 or 0:45)Geometry2.2 CIE Publications:No. 15.2 Colorimetry3No. 39.2 Recommendations for Surface Colours for VisualSignalling33. Terminology3.1 Definitions:3.1.1 Definitions in Practice E308 and of appearance termsin Terminology E284are applicable to this specif
9、ication.3.2 Definitions of Terms Specific to This Standard:3.2.1 pavement marking structured materialsa structuredroad marking has faces or edges in a regular or random patternthat are tilted towards the direction of traffic in order toenhance retroreflection in wet or rainy conditions or to produce
10、acoustic or vibrational effects by the passage of wheels, orboth.The pattern can be produced by non-uniform applicationof material in the liquid state, by reworking the surface ofapplied material while still liquid, or by other suitable means.4. Significance and Use4.1 This specification is intended
11、 for use during the lifetimeof the retroreflective pavement marking on the road surface.Specifications for characteristics other than color are found inother ASTM documents.5. Performance Requirements5.1 Chromaticity LimitsThe material must plot within theboundaries described by the four corner poin
12、ts listed in Tables1 and 2 when measured in accordance with the test methods inSection 7.5.1.1 Table 1Daytime (x,y) chromaticity coordinates ofthe corners of the regions for the colors of white, yellow, blueand red pavement markings. See Fig. 1.1This specification is under the jurisdiction of ASTM C
13、ommittee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.38 onHighway Traffic Control Materials.Current edition approved Oct. 1, 2016. Published October 2016. Originallyapproved in 2001. Last previous edition approved in 2015 as D6628 03 (2015).DOI: 10.1520/D6628
14、-16.2For 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 USNC-CIE Publications Office, TLA Lightin
15、g Consultants,Inc., 7 Pond Street, Salem, MA 01970.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.2 Table 2Nighttime (x,y) chromaticity coordinates ofthe corners of the regions for the colors of white and yellowpavement markings.
16、 See Fig. 2.5.1.3 Chromaticity and RetroreflectanceThe third dimen-sion of the perceived appearance of the road marking at nightis the retroreflectance. This quantity is specified in otherASTMdocuments on pavement markings and is not part of pavementmarking nighttime color specification. Research ha
17、s shown thatthe nighttime color as specified by chromaticity is sufficientand adequate for the color naming of the material as viewedunder nighttime conditions.5.2 Daytime Lightness Limits (Y Tristimulus Coordinate)The lightness limits shall conform to Table 3. (The 45/0 and0/45 geometry is the curr
18、ent standard practice for thesemeasurements.NOTE 1Daytime luminance factor testing of pavement markingsexcludes structured materials. They should be tested at the viewing angleencountered in usage using diffuse illumination and 87.71 viewing angle,which is not covered in this standard.6. Specimen Pr
19、eparation6.1 The test specimen shall be measured mounted on a flattest panel with a minimum test area of 0.1 m2in size. Typicaltest panels are 100 by 1000 mm.7. Test Methods7.1 Sample ConditioningFor new material conditioning,see Practice D7585/D7585M. For in-service testing, sampleshould be free of
20、 dirt or other obvious contamination.7.2 Daytime ColorDaytime color shall be measured inaccordance with Test Method E1349, using 45/0 (0/45)geometry, CIE illuminant D65 and the 1931 CIE 2 standardobserver. (See Annex A1 for correction factors when usingilluminant C).TABLE 1 Daytime ColorNOTE 1Daytim
21、e, Geometry 45/0 (0/45), CIE illuminant D65 and theCIE 1931 (2) standard observer.Color Daytime Chromaticity Coordinates (Corner Points)1234xyxyxyxyWhite 0.355 0.355 0.305 0.305 0.285 0.325 0.335 0.375Yellow 0.560 0.440 0.490 0.510 0.420 0.440 0.460 0.400Red 0.480 0.300 0.690 0.315 0.620 0.380 0.480
22、 0.360Blue 0.105 0.100 0.220 0.180 0.200 0.260 0.060 0.220Purple 0.300 0.064 0.309 0.260 0.362 0.295 0.475 0.144TABLE 2 Nighttime ColorNOTE 1Nighttime, Geometry observation angle of 1.05 andentrance angle of 88.76. CIE illuminantAand the CIE 1931 (2) standardobserver.Color Nighttime Chromaticity Coo
23、rdinates (Corner Points)1234xyxyxyxyWhite 0.480 0.410 0.430 0.380 0.405 0.405 0.455 0.435Yellow 0.575 0.425 0.508 0.415 0.473 0.453 0.510 0.490Purple 0.338 0.080 0.425 0.365 0.470 0.385 0.635 0.221FIG. 1 Daytime Chromaticity of Pavement MarkingsFIG. 2 Nighttime Chromaticity of Pavement MarkingsTABLE
24、 3 Luminance Factor, YAWith Glass BeadsColor Y YMinimum MaximumWhite 35 . . .Yellow 25 . . .Red 6 15Blue 5 14Purple 5 15AThe following in-service daytime luminance factor limits (tristimulus value Yexpressed as a percent) apply when measured with 45/0 (0/45) geometry andilluminant D65 using the 1931
25、 CIE 2 standard observer.D6628 1627.3 Nighttime ColorThe measurement of nighttime chro-maticity shall be in accordance with Test Method E811 usingthe geometric tolerance and sample positioning (includingangle setting techniques) as described in Test Method D4061.NOTE 2The referenced nighttime color
26、test method is primarily alaboratory procedure, and may not be convenient for use in the field forthe measurement of material in service. More convenient field testinstruments complying with this test method are expected to be availablein the near future.NOTE 3A precision statement for this specific
27、ation has not beendeveloped at this time. Therefore, this specification should not be used foracceptance or rejection of a material for purchasing purposes. Thisspecification does not include a test method, but refers to Test MethodE1349 and Practice E811, neither of which contain precision and bias
28、statements. The subcommittee established a task group to develop aprecision and bias statement on measurement of the color of pavementmarking materials, which will be coordinated with Committee E12 forinclusion in Test Method E1349. Additional study is required regardingdevelopment of a test method
29、from the standard practice documented inPractice E811 for measurement of nighttime color of pavement markings.8. Keywords8.1 pavement marking; retroreflective materialsANNEX(Mandatory Information)A1. CHANGE OF ILLUMINANT FACTORSA1.1 The correction factors given in Table A1.1 changemeasurements made
30、using illuminant C to approximate mea-surements made using illuminant D65.TABLE A1.1 Correction FactorsNOTE 1For ExampleA blue sample which measured (x, y, Y) =(0.150, 0.150, 5.0) using illuminant C would be converted to (0.149,0.158, 5.0) to provide the result using illuminant D65.Color x y YWhite
31、+0.003 +0.014 0.00Yellow +0.001 +0.002 0.00Red 0.000 +0.001 0.00Blue 0.001 +0.008 0.00D6628 163ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determina
32、tion of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or with
33、drawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that you
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