(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:
| 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.