X-Rite 939, Operator'S Manual

Page: 80 / 108

I N S T R U M E N T O P E R A T I O N
5-23
Strength Measurement
The Strength function displays the color strength of the
measured sample. Difference data from the standard is also
displayed if difference is activated in configuration. When
strength is displayed for color at 100% or Strength @ Min
∆
E,
the difference values automatically recalculate.
To perform a strength measurement:
1.
Select project location (if used) as discussed in the QA
function.
2.
Select the standard location if the auto standard selection is
not activated in configuration.
3.
Measure the sample.
4.
Use the Tab keys
$@
to highlight
Str =
(if not already
highlighted).
P r o j 1 : P R O J E C T A
S t d 1 : S T A N D A R D A
S a m p l e : # 1 8 : 5 0
L*a*b*
D65/10
......
....
∆
L* +1.00
Str =
∆
a* —0.26
93.7%
∆
b* —0.79
App
∆
E* 1.30
5.
Press the Enter key
#
to toggle to equivalent strength.
P r o j 1 : P R O J E C T A
S t d 1 : S T A N D A R D A
S a m p l e : # 1 8 : 5 0
L*a*b*
D65/10
......
....
∆
L* +0.15
@
Str
∆
a* —0.20
= 100% →
∆
b* —0.56
∆
E* 0.61
P r o j 1 : P R O J E C T A
S t d 1 : S T A N D A R D A
S a m p l e : # 1 8 : 5 0
L*a*b*
D65/10
......
....
∆
L* —0.73
≅
Str
∆
a* —0.14
@
Min
∆
E
→
∆
b* —0.30
101%
∆
E* 0.80
Color difference
predicted values with
equivalent strength
(at 100%)
Predicted @ 100%
Color Strength
Predicted @ Min
∆
E
Strength
Predicted strength to
achieve minimum
color values