ASTM D2244-93(2000)
Historical Standard: ASTM D2244-93(2000) Standard Test Method for Calculation of Color Differences From Instrumentally Measured Color Coordinates
SUPERSEDED (see Active link, below)
ASTM D2244
1. Scope
1.1 This test method covers the calculation, from instrumentally measured color coordinates based on daylight illumination, of small color differences between nonfluorescent, nonmetameric, opaque specimens such as painted panels. (Where it is suspected that the specimens may be metameric, that is, possess different spectral curves though visually alike in color, Practices D1729 and D4086 should be used to verify instrumental results.) The color differences determined by these procedures are expressed in terms of approximately uniform visual color perception in CIE 1976 CIELAB opponent-color space ( 1 ), Hunter L H ,a H , b H opponent-color space ( 2 ), and the Friele-MacAdam-Chickering (FMC-2) color space ( 3 ).
1.2 For product specification, the permissible color difference between test specimen and reference and the procedure for calculating the color difference shall be agreed upon by the purchaser and the seller. Specific color tolerances may be required for each material and condition of use since other appearance factors (for example, proximity, gloss, and texture) may affect the correlation between the magnitude of a measured color difference and its commercial acceptability.
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
D4086 Practice for Visual Evaluation of Metamerism
E284 Terminology of Appearance
E308 Practice for Computing the Colors of Objects by Using the CIE System
E805 Practice for Identification of Instrumental Methods of Color or Color-Difference Measurement of Materials
E1164 Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Other Standards
DIN6176 Farbmetrische, Bestimmung von Farbabstnden bei Krperfarben nach der DIN99-Formel Available from Beuth Verlag GmbH, 10772, Berlin, Germany, http://www.beuth.de/.Keywords
color; color difference; color metrics; color spaces; color tolerances; Color--paints/related coatings/materials; Instrumental measurement--paints/related coatings/materials; Latex paints; Light transmission and reflection; Reflectance and reflectivity--paints/related coatings/materials; Tristimulus value ;
ICS Code
ICS Number Code 17.180.20 (Colours and measurement of light)
DOI: 10.1520/D2244-93R00
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