20-65.005. Calculation


Effective on Tuesday, August 22, 2006
  • 1(1) Step 1 – The color number is calculated as follows:

    12(a) For the HunterLab Model D45 Citrus Colorimeter the color number is equal to 22.510 plus 0.165CR plus 0.111CY.

    31(b) For the HunterLab Model D45D2 Citrus Colorimeter the color number is read directly from the instrument and recorded.

    50(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.

    96CN = 17(3.4X/Y – Z/Y + 5/Y) – 12.6.

    105(d) For the Macbeth Color-Eye Spectrophotometer Model 2020+ with Optiview Software Package, the color number is read directly from the instrument and recorded.

    128(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.

    180(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.

    230(2) Step 2 – Apply the color number to the following table to determine the color score or equivalent color score for each appropriate product:

     

    255Color

    256Color Score

    258Adjustment

    259Color

     

    260Score for

    262for FCOJ &

    265for COJ &

    268Score for

    270Color Number

    272POJ & OJFC

    275CCOJ

    276COJFM

    277COJ & COJFM

    28032.5 – 33.4

    28333

    28433

    285+2

    28635

    28733.5 – 34.4

    29034

    29134

    292+2

    29336

    29434.5 – 35.4

    297

    29835

    299+1

    30036

    30134.5 – 34.9

    30435

    305

    306

    307

    30835.0 – 36.4

    31136

    312

    313

    314

    31535.5 – 36.4

    318

    31936

    320+1

    32137

    32236.5 – 37.4

    32537

    32637

    327+1

    32838

    32937.5 – 38.4

    33238

    33338

    3340

    33538

    33638.5 – 39.4

    33939

    34039

    3410

    34239

    34339.5 – 40.4

    34640

    34740

    3480

    34940

    350Rulemaking Authority 352601.10(7), 353601.11, 354601.24 FS. 356Law Implemented 358601.10(7), 359601.11, 360601.24 FS. 362History–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.

     

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