The GretagMacbeth ColorChecker® SG is a replacement for the ColorChecker® DC.
The ColorChecker® SG consists of 140 squares of paint applied to paper then mounted to a cardboard backing with a black frame around all the patches. There are 14 columns and 10 rows of patches. All the patches have a semi-gloss surface, which is represented by the SG in the name (Semi-Gloss). The outer patches are a pattern of white, gray and black patches.
The ColorChecker® SG is offered in an 11 x 8 inches size.
There is a 6 x 4 pattern of patches which correspond in color to the original ColorChecker®. The spectra and colorimetry of these patches are different from the original ColorChecker® so it cannot be used directly as a profiling substitute for a ColorChecker® without first making a new reference file by measuring this area with a spectrometer.
Just below this 6 x 4 patch area is another row of neutral patches. When combined with three additional gray patches in a nearby column the result is a 15 step neutral scale.
The spectral data for the ColorChecker® SG may be downloaded from the Spectral Library. Using these files with the demo version of SpectraShop will allow you to compare the spectra for the different editions and get colorimetric values for a large variety of viewing conditions.
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