Quiz 5A - Delta E
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Quiz 5A - Delta E
Q1:
Which of the following are advantages of having a numerical method for
specification of colour difference? (Select all that apply.)
A1:
Allows for easy communication of colour difference, Allows for easy setting of
pass/fail criterion.
Q2:
In the class a student measured the following L*a*b values for two colours.
Calculate the
for these measurements.
Sample 1:
L* = 35.72, a* = 38.34, b* = 50.08
Sample 2:
L* = 40.22, a* = 36.80, b* = 52.31
A2:
5.25
Q3:
In the class a student measured the following L*a*b values for two colours.
Sample 1:
L* = 59, a* = -56.01, b* = -29.22
Sample 2:
L* = 58, a* = -52.80, b* = -27.44
A3:
The CIEDE2000 for these measurements is
1.33
(Your answer should be
rounded to 2 decimal places.)
Q4:
The following question relates to
Match the description to the value.
1 Instrument repeatability
1.
0.1
5 Very poor colour match
2.
1-2
2 Typical tolerance for contract colour proofing
3.
3-6
4 Just noticeable colour difference
4.
1.0
3 Typical colour match in commercial printing
5.
8
Q5:
= 2, is considered a just-noticeable colour difference.
A5:
False
Q6:
Without measuring, estimate the
colour difference of these two blue
colours.
A6:
2
Q7:
What is the CIEDE2000 between the following L*a*b* values?
Sample A: 56, -54, -19
Sample B: 52, -52, -23
Q7:
4.50
Q8:
In the preceding question you calculated the colour difference between two
samples in terms of CIEDE2000. Which of the following best describes their colour
difference?
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1 Write on a blank poper your AUM student ID, full name, course code, section and date
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30
40
50
60
70
80
51
49
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49
49
49
49
49
49
49
49
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17.01
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P Flag question
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