ASTM_E_2214_-_12e1.pdf

Designation:E2214121Standard Practice forSpecifying and Verifying the Performance of Color-Measuring Instruments1This standard is issued under the fixed designation E2214;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.1NOTEReference to Fig.1 and Fig.2 and corrections in the table in A1.3.1 were made editorially in September 2013.INTRODUCTIONRecent advances in optics,electronics and documentary standard have resulted in a proliferation ofinstruments for the measurement of color and appearance of materials and objects.These instrumentspossess very good performance but there has been little progress toward standardizing the terminologyand procedures to quantify that performance.Therefore,the commercial literature and even somedocumentary standards are a mass of confusing terms,numbers and specifications that are impossibleto compare or interpret.Two recent papers in the literature,have proposed terms and procedures to standardize thespecification,comparison and verification of the level of performance of a color-measuringinstrument.2,3Following those procedures,those specifications can be compared to product tolerances.This becomes important so that instrument users and instrument makers can agree on how to compareor verify,or both,that their instruments are performing in the field as they were designed and testedin the factory.1.Scope1.1 This practice provides standard terms and proceduresfor describing and characterizing the performance of spectraland filter based instruments designed to measure and computethe colorimetric properties of materials and objects.It does notset the specifications but rather gives the format and process bywhich specifications can be determined,communicated andverified.1.2 This practice does not describe methods that are gener-ally applicable to visible-range spectroscopic instruments usedfor analytical chemistry(UV-VIS spectrophotometers).ASTMCommittee E13 on Molecular Spectroscopy and Chromatog-raphy includes such procedures in standards under their juris-diction.1.3 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:4D2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesE284 Terminology of AppearanceE1164 Practice for Obtaining Spectrometric Data for Object-Color Evaluation2.2 Other Documents:ISO VIM International Vocabulary of Basic and GeneralTerms in Metrology(VIM)51This practice is under the jurisdiction of ASTM Committee E12 on Color andAppearance and is the direct responsibility of Subcommittee E12.04 on Color andAppearance Analysis.Current edition approved July 1,2012.Published August 2012.Originallyapproved in 2002.Last previous edition approved in 2008 as E2214 081.DOI:10.1520/E2214-12E01.2Ladson,J.,“Colorimetric Data Comparison of Bench-Top and PortableInstruments,”AIC Interim Meeting,Colorimetry,Berlin,1995.3Rich,D.,“Standardized Terminology and Procedures for Specifying andVerifying the Performance of Spectrocolorimeters,”AIC Color 97 Kyoto,Kyoto,1997.4For 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.5ISO/IDE/OIML/BIPM,International Vocabulary of Basic and General Termsin Metrology,International Organization for Standardization,Geneva,Switzerland,1984.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NIST Technical Note 1297 Guidelines for Evaluating andExpressing the Uncertainty of NIST Measurement Re-sults63.Terminology3.1 Definitions of appearance terms in Terminology E284are applicable to this practice.3.2 Definitions of metrology terms in ISO,InternationalVocabulary of Basic and General Terms in Metrology(VIM)are applicable to this practice.3.3 Definitions of Terms Specific to This Standard:3.3.1 colorimetric spectrometer,nspectrometer,one com-ponent of which is a dispersive element(such as a prism,grating or interference filter or wedge or tunable or discreteseries of monochromatic sources),that is normally capable ofproducing as output colorimetric data(such as tristimulusvalues and derived color coordinates or indices of appearanceattributes)as well as the underlying spectral data from whichthe colorimetric data are derived.3.3.1.1 DiscussionAt one time,UV-VIS analytical spec-trophotometers were used for colorimetric measurements.Today,while instruments