X - R i t e e X a c t ™ I n s t r u m e n t
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3.
Tap the Measure Standard icon
or tap the Standard icon
to access the screen where
a standard is measured or selected from the library.
4.
Measure the standard, use the last reading, or select from the Pantone library.
5.
Tap the Back icon to return to the measurement screen.
6.
Measure samples to compare to the standard.
7.
View results.
Metamerism Function
The phenomenon where two colors appear to match under one light source, yet do not match
under different light sources. Two such colors are called a metameric pair. Up to three
Illuminant/observers can be compared to the current Illuminant/observer parameter. These will
show up in the results as MI1, MI2, and MI3.
Metamerism Function Setting
Tap the Metamerism button and set the illuminant/observer combinations for metamerism
function measurements. By determining the metamerism index you define the mutual color
modification of two colors when the illuminant changes. You can set a maximum of three test
illuminants.
- Tap the observer icon to alternate between 2° and 10°.
- Swipe the illuminant wheel up or down to select the desired illuminant.
- Set the illuminant to “off” if all three are not required.
Metamerism Measurement
A metamerism measurement displays the index values for up to three illuminant/observer
combinations.
NOTE:
The illuminant and observer parameters for metamerism have to be set before using this
function.
1.
Select the metamerism function.
2.
Measure or select a standard.
3.
Measure the sample.
4.
View measurement results.
Average DE value
Simulated color of standard
Function, illum/obs, and
Measurement Condition
selected
Simulated color of sample
Sample measurements
