1、Designation:D496008(Reapproved 2013)Standard Test Method forEvaluation of Color for Thermoplastic Traffic MarkingMaterials1This standard is issued under the fixed designation D4960;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes the instrumental determina-tion of color of thermoplastic traffic marking materials usin
3、gthe CIE tristimulus color measurement system.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of
4、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:2D883 Terminology Relating to PlasticsD7307 Practice for Sampling of Thermoplastic Traffic Mark-ing Materia
5、lsD7308 Practice for Sample Preparation of ThermoplasticTraffic Marking MaterialsE179 Guide for Selection of Geometric Conditions forMeasurement of Reflection and Transmission Propertiesof MaterialsE284 Terminology of AppearanceE308 Practice for Computing the Colors of Objects by Usingthe CIE System
6、E313 Practice for Calculating Yellowness and WhitenessIndices from Instrumentally Measured Color CoordinatesE1164 Practice for Obtaining Spectrometric Data for Object-Color EvaluationE1347 Test Method for Color and Color-Difference Mea-surement by Tristimulus ColorimetryE1349 Test Method for Reflect
7、ance Factor and Color bySpectrophotometry Using Bidirectional(45:0 or 0:45)GeometryF412 Terminology Relating to Plastic Piping Systems3.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology D883,E284 and F412,unless otherwise indicated.3.2 Definitions of Terms Specific to This St
8、andard:3.2.1 thermochromism,na change in color that takes placein the thermoplastic material with temperature changes.3.2.2 thermoplastic traffc marking material,na highlyfilled 100%total solids highway marking material that whenheated to a molten state can be extruded or sprayed onto a roadsurface
9、and when cooled forms a solid,durable delineator.4.Summary of Test Method4.1 The test specimen,representative of the material to betested,is taken from a molten sample obtained in accordancewith Practice D7307.The thermoplastic specimen is preparedby pouring into a TFE-fluorocarbon coated pan,to for
10、m a pattyof approximately 7.6 cm(3 in.)in diameter.The patty isallowed to cool to room temperature before measuring thecolor.Color measurements are made on the flat side or the topside of the thermoplastic patty.NOTE1No significant color differences are encountered in reading thetop or bottom of the
11、 patty.5.Significance and Use5.1 This test method provides a standard procedure for thedetermination of color of thermoplastic traffic marking mate-rials.This test method can be used in conjunction with variousthermoplastic pavement marking specifications to determinecompliance of the material to sa
12、id specification.This methodcan also be used by manufacturers of these materials todetermine the uniformity of thermoplastic traffic markingmaterials from batch to batch.5.2 There is a slight variation in color standards andcolorimeters.This test method is only applicable when resultsare reported wi
13、th information listing the instrument modeldesignation and calibration standard.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.44 on Traffic Coatings.Current edition approve
14、d Nov.1,2013.Published November 2013.Originallyapproved in 1989.Last previous edition approved in 2008 as D4960 08.DOI:10.1520/D4960-08R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume inf
15、ormation,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Apparatus6.1 60 mL(2 oz.)Metal Ladle.6.2 Color Measuring Instrument,conforming to all require-ments of Guide E179,P
16、ractice E1164,Test Method E1347,Test Method E1349,and Practice E308(bidirectional 45:0,capable of reporting data for the CIE D65/2,D6510 or C/2illuminant/observer conditions).6.3 TFE-fluorocarbon Baking Pans or Uncoated Pint CanLids,for forming 7.6-cm(3-in.)diameter patties.7.Procedure7.1 Obtain a representative sample of the thermoplasticpavement marking material following the guidelines of Prac-tice D7307.Prepare the sample for testing by followingPractice D7308.7.2 Prepare the thermoplastic s
