ASTM E1345-98 - 10.6.1998
 
1. Scope

1.1 Reduction of the variability associated with average color or color-difference measurements of object-color specimens is achieved by statistical analysis of the results of multiple measurements on a single specimen, or by measurement of multiple specimens, whichever is appropriate.

1.2 This practice provides a means for the determination of the number of measurements required to reduce the variablilty to a predetermined fraction of the relevant color or color-difference tolerances.

1.3 This practice is general in scope rather than specific as to instrument or material.

 
2. Referenced Documents

E1164-23

Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation

E456-13a(2022)

Standard Terminology Relating to Quality and Statistics (Includes all amendments and changes 4/21/2022).

E308-22

Standard Practice for Computing the Colors of Objects by Using the CIE System

E178-21

Standard Practice for Dealing With Outlying Observations

D2244-23

Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

E284-22

Standard Terminology of Appearance

D3134-15(2019)

Standard Practice for Establishing Color and Gloss Tolerances

SAE J?1545

Recommended Practice for Instrumental Color Difference Measurement for Exterior Finishes, Textiles and Colored Trim Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.