This procedure is used to determine the amount of haze and the degree of color exhibited by the resin or flake. This is an indication of how effectively the material was processed and/or the material’s ability to be processed.


The samples are measured in terms of L*, a*, and b*, DE*: L* (100=white; 0=black), a* (positive=red; negative=green; 0=gray), b* (positive=yellow; negative=blue; 0=gray), DE is a mathematical equation which takes into account the values of L*, a* and b*.