HunterLab EasyMatch QC, User Manual

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EasyMatch QC User’s Manual Version 2.1
A-32 Measurement Values
Read Methods
Haze (ColorQuest XE, ColorQuest II Sphere, UltraScan XE, UltraScan PRO,
and UltraScan VIS only)
A transmission haze measurement is a ratio of the diffuse light to the total light transmitted by a
specimen. Useful measurements of haze can be made on the HunterLab instruments listed above,
although the results do not conform exactly to ASTM method D1003 because of differences in
instrument geometry. Haze is calculated as follows:
100 x
Y
Y
Haze
on Transmissi Total
on Transmissi Diffuse
=
.
Haze measurements can be made only in a transmission mode on a benchtop sphere instrument
(ColorQuest XE, ColorQuest II Sphere, UltraScan XE, UltraScan PRO, or UltraScan VIS).
In order to measure and display haze values, follow the steps outlined below:
1. Select Read Method from the Options menu.
2. Select Haze from the dialog box that appears. The screen changes to allow additional options.
3. Haze is automatically selected for display in your Color Data Table. Check the boxes next to Y
Total and/or Y Diffuse to also show these components of the haze calculation. Click the radio
button next to the illuminant/observer combination you wish to use. Then click
OK .
4. Standardize the instrument in TTRAN mode.
5. Read the standard or sample by choosing Read Standard or Read Sample from the Measurements
menu, clicking the Read Standard or Read Sample button on the toolbar, or pressing F2 or F3 .
The following prompt appears.