Haze and Color Measurement (Preform & Container)
| Sample Type | Required Quantity | Equipment Used |
| Preforms Bottles |
6 |
Minolta Spectrophotometer |
Purpose
This procedure is used to determine the amount of haze and the degree of
color exhibited by a preform or container sidewall. This is an
indication of how effectively the material was processed and/or the
material’s ability to be processed.
Description
The samples are measured in terms of L*, a*, b*, DE* and Haze: 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*. Haze measures the
scattering of light through the sample; the higher the number the more
haze. The haze can be used as an indicator of the presence of
crystallinity in the sample.
Video Demonstration
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