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Table 1 Lightness values (L*) are calculated using D50 illuminant and 2° standard observer

From: Exploring the limits of color accuracy in technical photography

Samples L*
(i1Pro)
L*
(spectro2guide)
Gloss values (spectro2guide)
7 NCS Gloss Scale S-9000 N 5.4–23.6 5.1–22.9 2.0–93.2 GU
2 darkest patches
19 other patches
from the Munsell Linear Gray Scale
4.4–5.1
9.0–93.6
4.3–4.6
8.4–92.6
79.9–81.9 GU
13.2–21.9 GU
7 Car Refinishes Mix & Matte (AkzoNobel) 0.8–5.0 0.5–4.3 10.2–89.7 GU
  1. Gloss values refer to Gloss Units (GU) measured at 60°. The 21 patches from the Munsell Linear Gray Scale have been subdivided into 2 sets containing two darkest patches and 19 other patches