Florida Regulations 20-65.005: Calculation
Current as of: 2024 | Check for updates
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(1) Step 1 – The color number is calculated as follows:
(a) For the HunterLab Model D45 Citrus Colorimeter the color number is equal to 22.510 plus 0.165CR plus 0.111CY.
(b) For the HunterLab Model D45D2 Citrus Colorimeter the color number is read directly from the instrument and recorded.
(c) For the Macbeth Color-Eye Spectrophotometer Model LS-1500, the color number is equal to 17 multiplied by the sum of 3.4 times X divided by Y minus Z divided by Y plus 5 divided by Y, and subtract a constant factor 12.6 from the resulting total.
CN = 17(3.4X/Y – Z/Y + 5/Y) – 12.6.
(d) For the Macbeth Color-Eye Spectrophotometer Model 2020+ with Optiview Software Package, the color number is read directly from the instrument and recorded.
(e) For the Macbeth Color-Eye Spectrophotometer Model 3000 and 3100 with Optiview Software Package, the color number is read directly from the instrument and recorded; or it may be calculated from the measured tristimulus X, Y and Z values by applying the equation CN = 14.5(3.15X/Y – Z/Y + 5.2/Y) – 2.6.
(f) For the GretagMacbeth Color-Eye Spectrophotometer Model i5 with Color iQC Basic Software, the color number is read directly from the instrument and recorded; or it may be calculated from the measured tristimulus X, Y and Z values by applying the equation CN = 14.5(3.15X/Y – Z/Y + 4.1/Y) -2.6.
(2) Step 2 – Apply the color number to the following table to determine the color score or equivalent color score for each appropriate product:
(b) For the HunterLab Model D45D2 Citrus Colorimeter the color number is read directly from the instrument and recorded.
(c) For the Macbeth Color-Eye Spectrophotometer Model LS-1500, the color number is equal to 17 multiplied by the sum of 3.4 times X divided by Y minus Z divided by Y plus 5 divided by Y, and subtract a constant factor 12.6 from the resulting total.
CN = 17(3.4X/Y – Z/Y + 5/Y) – 12.6.
(d) For the Macbeth Color-Eye Spectrophotometer Model 2020+ with Optiview Software Package, the color number is read directly from the instrument and recorded.
(e) For the Macbeth Color-Eye Spectrophotometer Model 3000 and 3100 with Optiview Software Package, the color number is read directly from the instrument and recorded; or it may be calculated from the measured tristimulus X, Y and Z values by applying the equation CN = 14.5(3.15X/Y – Z/Y + 5.2/Y) – 2.6.
(f) For the GretagMacbeth Color-Eye Spectrophotometer Model i5 with Color iQC Basic Software, the color number is read directly from the instrument and recorded; or it may be calculated from the measured tristimulus X, Y and Z values by applying the equation CN = 14.5(3.15X/Y – Z/Y + 4.1/Y) -2.6.
(2) Step 2 – Apply the color number to the following table to determine the color score or equivalent color score for each appropriate product:
Color
Color Score
Adjustment
Color
Score for
for FCOJ &
for COJ &
Score for
Color Number
POJ & OJFC
CCOJ
COJFM
COJ & COJFM
32.5 – 33.4
33
33
+2
35
33.5 – 34.4
34
34
+2
36
34.5 – 35.4
—
35
+1
36
34.5 – 34.9
35
—
—
—
35.0 – 36.4
36
—
—
—
35.5 – 36.4
—
36
+1
37
36.5 – 37.4
37
37
+1
38
37.5 – 38.4
38
38
0
38
38.5 – 39.4
39
39
0
39
39.5 – 40.4
40
40
0
40
Rulemaking Authority 601.10(7), 601.11, 601.24 FS. Law Implemented 601.10(7), 601.11, 601.24 FS. History-Formerly 105-1.19(1)(r), (2)(c), Amended 1-1-75, 4-15-76, Formerly 20-65.05, Amended 1-30-86, 1-12-92, 6-21-93, 1-17-95, 10-26-97, 8-22-06.