XYZ Tristimulus

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The CIE XYZ 1931 Tristimulus system is a modified version of the RGB colour tristimulus system and uses non real or imaginary stimuli. This innovation allows all colours within its gamut to be expressed as positive numbers, unlike the RGB system, where some colours fall outside its gamut and are expressed as negatives. The XYZ chromaticity co-ordinates are defined as x,y,and z.

Tristimulus values are percentages of the components in a three-colour additive mixture necessary to match a colour; in the CIE system, they are designated as X, Y and Z. The illuminant and standard observer colour-matching functions used must be designated; if they are not, the assumption is made that the values are for the 1931 observer (2º field) and illuminant C.

The values obtained depend on the method of integration used, the relationship of the nature of the sample and the instrument design used to measure the reflectance or transmittance. Tristimulus values are not, therefore, absolute values characteristic of a sample, but relative values dependent on the method used to obtain them.

Approximations of CIE tristimulus values may be obtained from measurements made on a tristimulus colorimeter that gives measurements generally normalised to 100.

These must then be normalised to equivalent CIE values. The filter measurements should be properly designated as R, G and B instead of X, Y and Z.

Applications

  • Chemicals
  • Coatings
  • Edible Oils and Fats
  • Food and Beverage
  • Household Products
  • Petroleum Oils and Waxes
  • Plastics
  • Sugar Solutions, Syrups and Honey
  • Textiles
Title Application Part Number Mark as favourite
  • Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Plastics | Sugar Solutions, Syrups and Honey | Textiles | Waste Water Treatment
400810
  • Chemicals | Coatings | Household Products | Plastics | Textiles
400590
  • Chemicals | Coatings | Household Products | Plastics | Textiles
400610
  • Chemicals | Coatings | Household Products | Petroleum Oils and Waxes
1371951
  • Petroleum Oils and Waxes
1371952
  • Edible Oils and Fats | Food and Beverage
1371953
  • Beer, Malts and Caramels | Food and Beverage
1371954
  • Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics
1371955
  • Chemicals | Household Products
1371956
  • Sugar Solutions, Syrups and Honey
1371957
  • Waste Water Treatment
1371958
  • Beer, Malts and Caramels | Chemicals | Coatings | Edible Oils and Fats | Food and Beverage | Household Products | Medical and Clinical Products | Petroleum Oils and Waxes | Pharmaceuticals and Cosmetics | Plastics | Sugar Solutions, Syrups and Honey
1371959
  • Edible Oils and Fats
1378802
  • Beer, Malts and Caramels | Chemicals | Coatings | Edible Oils and Fats | Food and Beverage | Household Products | Medical and Clinical Products | Petroleum Oils and Waxes | Pharmaceuticals and Cosmetics | Plastics | Sugar Solutions, Syrups and Honey | Waste Water Treatment
1378806
  • Beer, Malts and Caramels | Chemicals | Coatings | Edible Oils and Fats | Food and Beverage | Household Products | Medical and Clinical Products | Petroleum Oils and Waxes | Pharmaceuticals and Cosmetics | Plastics | Sugar Solutions, Syrups and Honey | Waste Water Treatment
1378806H
  • Edible Oils and Fats | Food and Beverage
1378807
  • Edible Oils and Fats | Food and Beverage
1378807H
  • Edible Oils and Fats
1378804
  • Edible Oils and Fats
1378804H
  • Edible Oils and Fats
1378801
  • Petroleum Oils and Waxes
1378803
  • Petroleum Oils and Waxes
1378803H
  • Sugar Solutions, Syrups and Honey
1378805
  • Sugar Solutions, Syrups and Honey
1378805H
  • Edible Oils and Fats
1378802H
  • Edible Oils and Fats
1378801H
  • Chemicals | Edible Oils and Fats
1379501
  • Petroleum Oils and Waxes
1379502
  • Petroleum Oils and Waxes
1379502H
  • Chemicals | Edible Oils and Fats
1379501H
  • Chemicals | Edible Oils and Fats | Food and Beverage | Household Products | Petroleum Oils and Waxes
1379951
  • Petroleum Oils and Waxes
1379952
  • Petroleum Oils and Waxes
1379952H
  • Chemicals | Edible Oils and Fats | Food and Beverage | Household Products | Petroleum Oils and Waxes
1379951H
  • Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Plastics
402505
  • Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Plastics
400300
  • Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Plastics
400305
  • Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Plastics
400310
  • Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Plastics
400320
  • Chemicals | Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics | Plastics | Textiles
400400
  • Chemicals | Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics | Plastics | Textiles
400500
  • Chemicals | Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics | Plastics | Textiles
400505
  • Chemicals | Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics | Plastics | Textiles
400504
  • Chemicals | Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics | Plastics | Textiles
400520
  • Chemicals | Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics | Plastics | Textiles
400530
  • Chemicals | Coatings | Food and Beverage | Household Products | Medical and Clinical Products | Pharmaceuticals and Cosmetics | Plastics | Textiles
407000
  • Chemicals | Coatings | Food and Beverage | Household Products | Plastics | Textiles
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Applicable Standard ASTM E308