The Adams-Nickerson or AnLab Color Scale is a Munsell-based color scale. This color scale has 92 units between black and white.
The AnLab Color Scale is normally expressed as LA, aA, and bA. It is an opponent-color system similar to the other Lab systems.
Conditions for Measurement
Instrumental: Most HunterLab color measurement instruments. Availability may depend on the software package.
Standard Observer Function: 2 or 10 degree
Transmittance and/or Reflectance: Either.
This color scale is no longer used very often. This color scale may be used for measurement of the color of any object whose color can be measured.
(See attached pdf file for the complete article and formulas)