ASTM D2244-21
Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

Standard No.

ASTM D2244-21

Release Date

2021

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D2244-22

Latest

ASTM D2244-23

Scope

1.1 This practice covers the calculation, from instrumentally measured color coordinates based on daylight illumination, of color tolerances and small color differences between opaque specimens such as painted panels, plastic plaques, or textile swatches. Where it is suspected that the specimens may be metameric, that is, possess different spectral curves though visually alike in color, Practice D4086 should be used to verify instrumental results. The tolerances and differences determined by these procedures are expressed in terms of approximately uniform visual color perception in CIE 1976 CIELAB opponent-color space (1)2 , CMC tolerance units (2), CIE94 tolerance units (3), the DIN99 color difference formula given in DIN 6176 (4), or the CIEDE2000 color difference units (5). 1.2 For product specification, the purchaser and the seller shall agree upon the permissible color tolerance between test specimen and reference and the procedure for calculating the color tolerance. Each material and condition of use may require specific color tolerances because other appearance factors, (for example, specimen 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 concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D2244-21 Referenced Document

• ASTM D1729 Standard Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
• ASTM D4086 Standard Practice for Visual Evaluation of Metamerism
• ASTM E1164 Standard Practice for Obtaining Spectrophotometric Data for Object-Color Evaluation
• ASTM E284 Standard Terminology of Appearance
• ASTM E308 Standard Practice for Computing the Colors of Objects by Using the CIE System
• ASTM E805 Standard Practice for Identification of Instrumental Methods of Color or Color-Difference Measurement of Materials

ASTM D2244-21 history

• 2023 ASTM D2244-23 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2022 ASTM D2244-22 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2021 ASTM D2244-21 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2016 ASTM D2244-16 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2015 ASTM D2244-15a Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2015 ASTM D2244-15e1 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2015 ASTM D2244-15 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2014 ASTM D2244-14 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2011 ASTM D2244-11 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2009 ASTM D2244-09b Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2009 ASTM D2244-09a Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2009 ASTM D2244-09 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2007 ASTM D2244-07e1 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2007 ASTM D2244-07 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2005 ASTM D2244-05 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2002 ASTM D2244-02e1 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 2002 ASTM D2244-02 Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
• 1993 ASTM D2244-93(2000) Standard Test Method for Calculation of Color Differences From Instrumentally Measured Color Coordinates