ASTM_E_2630_-_08_2013.pdf

Designation:E263008(Reapproved 2013)Standard Test Method forLuminance Ratio of a Fluorescent Specimen using a NarrowBand Source1This standard is issued under the fixed designation E2630;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the instrumental measurementof the luminance ratio of a fluorescent coating or sheet samplewhen illuminated by a narrow band source.1.2 This test method is generally applicable to any coatingor sheeting material having combined fluorescent and reflectiveproperties,where the fluorescence is activated by 405 nm light.1.3 This test method is intended as a companion to Speci-fication E2501 to support the development and specification ofindustrial coatings that are used in a system for detection ofcoating defects when inspected with the Specification E2501light source.This test method establishes a quantitative mea-sure of the optical property of a coating that correlates to itsability to enhance defect contrast under the specified inspectionlight source.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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:2D2805 Test Method for Hiding Power of Paints by Reflec-tometryD4356 Practice for Establishing Consistent Test MethodTolerances(Withdrawn 2007)3D5162 Practice for Discontinuity(Holiday)Testing of Non-conductive Protective Coating on Metallic SubstratesE179 Guide for Selection of Geometric Conditions forMeasurement of Reflection and Transmission Propertiesof MaterialsE284 Terminology of AppearanceE1164 Practice for Obtaining Spectrometric Data for Object-Color EvaluationE1488 Guide for Statistical Procedures to Use in Developingand Applying Test MethodsE2501 Specification for Light Source Products for Inspec-tion of Fluorescent Coatings2.2 Other Documents:ISO 10527:2007(E)CIE S 014-1 E:2006CIE StandardColorimetric Observers4CIE Publication 69:1987 Methods of characterizing illumi-nance meters and luminance meters:Performance,char-acteristics and specifications42.3 SSPC:SSPC-SP 10/NACE No.2 Near-White Blast Cleaning53.Terminology3.1 The definitions contained in Guide E179,TerminologyE284,and Practice E1164 are applicable to this test method.3.2 The definitions for coating defects,discontinuity,holiday,and pinhole are contained in Practice D5162.3.3 Definitions of Terms Specific to This Standard:3.3.1 luminance ratio,nluminance of the sample under agiven narrow band 405 nm source divided by the luminance ofa 25%reflecting Lambertian diffuser under the same narrowband 405 nm source.4.Summary of Test Method4.1 This test method provides a procedure for measuring theluminance ratio of a fluorescent,reflective coating compared to1This test method is under the jurisdiction of ASTM Committee E12 on Colorand Appearance and is the direct responsibility of Subcommittee E12.05 onFluorescence.Current edition approved July 1,2013.Published July 2013.Originally approvedin 2008.Last previous edition approved in 2008 as E2630 081.DOI:10.1520/E2630-08R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from U.S.National Committee of the CIE(International Commissionon Illumination),C/o Thomas M.Lemons,TLA-Lighting Consultants,Inc.,7 PondSt.,Salem,MA 01970,http:/www.cie-usnc.org.5Available from Society for Protective Coatings(SSPC),40 24th St.,6th Floor,Pittsburgh,PA 15222-4656,http:/www.sspc.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 a 25%reflecting Lambertian diffuser,which is similar to steelgrit blasted to an SSPC-SP 10/NACE No.2 near-white metalblast.4.2 This test method requires the use of a luminance meter,a narrow band 405 nm source and a calibrated non-fluorescentreflectance standard.5.Significance and Use5.1 The test method is suitable for the development,speci-fication and quality control testing of fluorescent and non-fluorescent coatings that are intended to be inspected fordefects under Specification E2501 illumination.6.Apparatus6.1 Illuminator:6.1.1 The source shall have a peak wavelength of 405 nm(61 nm),a symmetric unimodal distribution with a full widthhalf maximum of 16 nm(62 nm