Art Spectrum® Dry Ground Pigment Ultramarine Blue.
This red shade of Ultramarine Blue is a warm bright blue with good tinting strength.
The pigment was synthetically produced by French chemist Guimet in 1828 to replace the expensive natural Lapis Lazuli.
A synthetic inorganic pigment with excellent lightfast properties.
|Series||Colour Index||Chemical Description||Classification||Opacity||ASTM|
|2||PB29||Polysulfide of Sodium-Alumino-Silicate||Synthetic Inorganic||Semi Transparent||ASTMI|
ASTM Approved Permanent Colours American Society for Testing and Materials, conforming to standard D4302-90.