HunterLab EasyMatch QC, Руководство пользователя

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EasyMatch QC User’s Manual Version 2.1
2-16 Lessons
A ratio hitch is a ratio multiplier of the values measured using your instrument. The value
displayed in the Color Data Table for each parameter (such as L, a, and b) is the measured value
times the ratio value determined by the hitch standard. The ratio value is automatically calculated by
EasyMatch QC. The ratio hitch is slightly more robust than the additive hitch for measuring samples
of varying colors.
8. Choose the color scale and illuminant/observer for which you have hitch standard measurements.
We happen to have CIELAB values using D65/10°. Type the assigned values into the cells next to
the word “Target” and click
OK twice. In this case, type in 94.00 for L*, -1.00 for a*, and 1.00 for
b*.
Note: When using a tristimulus hitch you should enter hitch values using the same
illuminant/observer as you wish to use for measurements. The software cannot calculate
measurement values for a different illuminant/observer when a tristimulus hitch is being used.
9. Read the samples you wish to adjust according to the hitch, associating them with the standard you
just hitched. Samples on the branches for other standards will not be hitched. If, at any time, you
wish to stop using the hitch associated with this standard, simply access the Hitch Readings to
Standard screen again, and check the box next to “Disable Hitch Temporarily.” The items that are
hitched will be shown in the Job Tree with a special “H” icon to indicate that they are hitched.