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Calibr8 ColorChart® v1

This is a copy of the venerable GretagMacbeth ColorChecker®.

Description

The ColorChart® v1 is manufactured by Calibr8 (www.calibr8.com but all the information is on the german site www.calibr8.de). The sample tested was 30 x 21 cm in size (about 8.25 x 11.75 inches), consisting of a foam board with the color on one surface.

As shown in the following image of the Neutral 8 patch, it is clear that the ColorChart® v1 is an inkjet print mounted on the foam board.

Observations

The ColorChart® has a printed black frame, so the surface is uniformly flat.

It has a matte surface, which may have been spray applied.

The white paper used for the print contains a fluorescent whitening agent.

The grays are not spectrally neutral, with a defined peak at 500-510 nm. This peak appears in almost all the patches. There is also increased red reflectance.

The print was produced on a printer with at least 6 colorants.

Colorimetric Data

  Reference
CIE 1976 L*a*b*, D50, 2°
Calibr8 ColorChart®
CIE 1976 L*a*b*, D50, 2°
Name L* a* b* L* a* b* dE 1976
Dark skin 39.07 13.70 14.37 38.28 14.89 14.49 1.43
Light skin 66.36 18.08 18.56 66.48 18.71 17.68 1.09
Blue sky 50.66 -4.84 -21.44 50.69 -4.85 -20.79 0.65
Foliage 44.03 -13.01 22.34 43.57 -10.92 23.80 2.60
Blue flower 55.87 8.88 -24.79 55.26 9.67 -25.78 1.40
Bluish green 71.47 -32.98 0.65 71.95 -31.73 1.72 1.71
Orange 62.37 36.05 56.58 62.89 36.58 57.08 0.91
Purplish blue 40.77 9.18 -43.58 41.68 10.57 -46.55 3.40
Moderate red 51.68 48.21 16.75 51.44 46.97 16.24 1.37
Purple 31.27 20.00 -20.83 31.78 21.59 -20.78 1.67
Yellow green 72.74 -22.60 57.15 73.75 -22.03 59.55 2.66
Orange yellow 72.35 19.57 68.76 72.18 18.97 69.06 0.69
Blue 29.61 13.63 -49.65 37.60 10.22 -42.67 11.15
Green 55.61 -37.19 31.81 55.55 -37.38 36.01 4.21
Red 42.23 55.32 27.45 42.69 55.04 27.84 0.66
Yellow 82.65 4.44 80.52 81.86 3.70 82.24 2.03
Magenta 52.55 49.33 -14.42 52.79 50.35 -16.77 2.56
Cyan 52.24 -28.24 -27.14 52.95 -29.14 -24.83 2.58
White 96.37 -0.30 3.26 95.20 1.62 -0.72 4.57
Neutral 8 81.70 -0.56 0.25 81.52 0.15 0.18 0.74
Neutral 6.5 66.49 -0.33 0.03 67.85 -1.05 1.70 2.27
Neutral 5 50.67 -1.06 -0.19 50.65 -0.15 0.03 0.93
Neutral 3.5 36.23 -0.48 -0.26 37.30 0.57 0.38 1.63
Black 20.68 0.17 -0.55 21.64 1.67 1.98 3.09

The reference CIE 1976 L*a*b* coordinates were obtained by averaging spectral measurements from two October 2002 edition ColorCheckers®. The charts were measured with a GretagMacbeth Spectrolino® equipped with a D65 filter. The spectral data was acquired, averaged and analyzed with SpectraShop™.

In the following Spectra graphs, the blue line is the ColorChart, the brown line is the reference ColorChecker.

Name
Spectrum
Difference
Dark skin
Light skin
Blue sky
Foliage
Blue flower
Bluish green
Orange
Purplish blue
Moderate red
Purple
Yellow green
Orange yellow
Blue
Green
Red
Yellow
Magenta
Cyan
White
Neutral 8
Neutral 6.5
Neutral 5
Neutral 3.5
Black

Updated 5.4.2007

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