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Table 3 Measurements with Specro2Guide for L* on two ColorChecker SG charts, produced in 2014 and in 2019

From: Exploring the limits of color accuracy in technical photography

L* Black patches White patches
Chart version 2014 7.82–8.52; 8.98 (E6: 7.94)
(C10: 8.98)
94.72–94.93
Chart version 2019 9.74–10.79; 10.85 (E6: 10.14)
(C10: 10.85)
95.07–95.51
  1. The columns show the range of values found when measuring on all black patches and on all white patches of the chart