1、Designation:D154404(Reapproved 2018)Standard Test Method forColor of Transparent Liquids(Gardner Color Scale)1This standard is issued under the fixed designation D1544;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the measurement of
3、the color oftransparent liquids by means of comparison with arbitrarilynumbered glass standards.1.2 Users of this method should have normal color vision.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does n
4、ot 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international stand
5、ard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Refere
6、nced Documents2.1 ASTM Standards:2D1545 Test Method for Viscosity of Transparent Liquids byBubble Time MethodD6166 Test Method for Color of Pine Chemicals and Re-lated Products(Instrumental Determination of GardnerColor)E308 Practice for Computing the Colors of Objects by Usingthe CIE System3.Signif
7、icance and Use3.1 This test method applies to drying oils,varnishes,fattyacids,polymerized fatty acids,and resin solutions.Its applica-tion to other materials has not been tested.4.Apparatus4.1 Glass Standards,18,numbered separately,and havingthe color characteristics given in Table 1.The color shal
8、l beproduced by the glass components only.Some glass standardsin use today do not conform to the values reported in Table 1.The calibration of glass standards should be verified prior touse;a suitable procedure for their calibration is contained inAppendix X1.4.2 Glass Tubes,clear,10.65 mm in inside
9、 diameter andabout 114 mm in outside length.(Viscosity tubes,as describedin Test Method D1545,are satisfactory.)4.3 Suitable apparatus for comparing sample and standard.The apparatus may be of any design,but should have thefollowing characteristics:4.3.1 IlluminationCIE Illuminant C.4.3.2 Surroundin
10、g FieldThe field should be black.4.3.3 Field of ViewThe specimen and one or more stan-dards should subtend a visual angle of about 2 and be in thefield of view simultaneously.4.3.4 Separation of Standard and SpecimenThere shouldbe a perceptible separation between specimen and standard,butthis should
11、 be as small as is mechanically possible.5.Procedure5.1 Fill a glass tube with the material under test.If thematerial is perceptibly cloudy,first filter it.5.2 Compare with glass standards,determining which stan-dard most closely matches the specimen in brightness andsaturation.Ignore hue difference
12、s.6.Report6.1 Report the color as the number of the standard mostclosely matching the specimen.If more precise measurementsare needed,report as either matching a standard or lighter ordarker.Thus,between colors 5 and 6,the steps will be 5,5+,6,and 6.1This test method is under the jurisdiction of Com
13、mittee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.26 on Optical Properties.Current edition approved June 1,2018.Published June 2018.Originallyapproved in 1958.Last previous edition approved in 2010 as D1544 04(2010).DOI:10.1520/D15
14、44-04R18.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box
15、 C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the Wo
16、rld Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.2 Report any significant difference in hue between thesample and the nearest-match standard.7.Precision and Bias7.1 On the basis of a study in which one observer at each of80 laboratories made duplicate determinations on four samples,the“between”and“within”standard deviations were found tobe 0.5 and 0.1 color number,respectively.Based on thesestandard deviations,the following criteria should be used forjudging the acceptability
