Raw Sienna Pigment Classification: Natural Inorganic Chemical Description: Natural Iron Oxide Opacity/Transparency: 3 Lightfastness Rating: I Permanency: Excellent Colour Index Name: PY 43 Colour Index Number: 77492 Munsell Notation Listing: Hue: 19.0 YR Value: 4.50 Chroma: 6.6 Pantone Matching System: 1395 Spectrophotometer Readings: N/A Viscosity Range: 23000-27000 CPS PH Range: 8.3-9.0 Gloss Average: 27.98 CIE L*a*b* Values: L*88.09 a*4.82 b*12.73 Tint Strength: 88.08