Art Spectrum® Dry Ground Pigment Raw Sienna.
Raw Sienna is a natural iron oxide pigment that was used in prehistoric cave art. The name comes from Siena in Italy where deposits were mined since Roman times.
A semi-transparent natural inorganic pigment with excellent lightfast properties.
|Series||Colour Index||Chemical Description||Classification||Opacity||ASTM|
|1||PBr7||Natural Iron Oxide||Natural Inorganic||Semi Transparent||ASTMI|
ASTM Approved Permanent Colours American Society for Testing and Materials, conforming to standard D4302-90.