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Historically a very expensive ground lazurite pigment, synthetic pigment has been used since the 1830's making it one of the most popular and affordable blues, Yves Klein blue is mostly Ultramarine.
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Pigment Classification:åÊSynthetic Inorganic
Color Index Name:åÊPB 29
Color Index Number:åÊ77007
Chemical Description:åÊPolysulfide of Sodium-Alumino-Silicate
Opacity/Transparency:åÊSemi-Transparent
Lightfastness Rating:åÊI
Permanency:åÊNot for exterior use
Munsell Notation Listing:åÊHue 8.0 PB Value 2 Chroma 4.5
Gloss Average:åÊ15.7
Viscosity Range:åÊ4000-15000 CPS
CIE L*a*b* Values:åÊL*24.36 a*12.28 b*-25.74
Tint Strength:åÊ82
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