HunterLab EasyMatch QC, Руководство пользователя

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EasyMatch QC User’s Manual Version 2.1
A-24 Measurement Values
x
n+1
= the x chromaticity coordinate of the Gardner color standard which is darker than
the test material.
The fractional portion of the Gardner color is calculated as follows:
( )( ) ( )( )
( ) ( )
2
n 1 n
2
n 1 n
n TM n 1 n n TM n 1 n
F
y - y x - x
y - y y - y x - x x - x
G
+ +
+ +
+
+
=
where
y
n
= the y chromaticity coordinate of the Gardner color standard which is lighter than the
test material
y
TM
= the y chromaticity coordinate of the test material
y
n+1
= the y chromaticity of the Gardner color standard which is darker than the test
material
x
n
, x
n+1
, and x
TM
are as defined above.
Available values range from 0.1 to 18.0 for both Gardner scales. A value of zero or 18.1 indicates the
value is out of range.
Gardner D6166 Difference is also available, and is defined as follows:
dGardner D6166 = (Gardner D6166)
sample
- (Gardner D6166)
standard.
Saybolt-50/100 mm (ColorQuest II Sphere, ColorQuest XE, ColorQuest XT,
UltraScan PRO, UltraScan XE, and UltraScan VIS only)
The Saybolt index is calculated as described below. These calculations adjust the spectral data to
account for use of a 50-mm sample cell rather than a 100-mm cell, so spectral data must be available for
this type of calculation.






∆
+ =
2.55 - * E log
44.5
51.1 Saybolt
10
where
( )
2 2
2
* b + * a * L - 100 = * E
+ ∆
L* is the L* value for the sample calculated for C/2° conditions
a* is the a* value for the sample calculated for C/2° conditions
b* is the b* value for the sample calculated for C/2° conditions.