NCS ATLAS 2050 -- new 
A reference binder explaining the NCS System with 2050 non-removable color samples allowing quick navagation of color space and color relationships to each other.   Each triangle is based on NCS nuance such as blackness, whiteness, chromaticness and NCS lightness values.
Binder Size: 14 1/4" W x 13" L x 2 1/4" D
45 Pages include NCS Color Circle and 40 NCS Hue pages; with 1 Neutral/Tinted Gray and 3 Tinted White pages.
Sample sizes are basically 5/8" x 5/8" with a few are 5/8" x 1/2"
International ASTM Standard