DIFF Subgroup Additional Only
C09C 2200/20 Interference pigments comprising a layer with a concentration gradient or a gradient of the refractive index
Full Title
Compositional and structural details of pigments exhibiting interference colours > Interference pigments comprising a layer with a concentration gradient or a gradient of the refractive index
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Note: 3 CPC extensions are marked as secondary classification only.