Columbia subject headings:
Artists' materials--Congresses.
Painting--Technique--Congresses.
Harvard subject headings:
Archaeometry--Congresses
Art--Conservation and restoration--Congresses.
Color in art--Congresses.
Color--Technique--Congresses.
Pigments--Congresses.
Polychromy--Congresses.
Princeton subject headings:
Archaeometry--Congresses.
Art--Conservation and restoration--Congresses.
Color in art--Congresses.
Color--Technique--Congresses.
Pigments--Congresses.
Polychromy--Congresses.