Nickel Azo Yellow Pigment Classification: Synthetic Inorganic Chemical Description: Nickel Complex Azo Opacity/Transparency: 7 Lightfastness Rating: I Permanency: Excellent Colour Index Name: PY 150 Colour Index Number: NA Munsell Notation Listing: Hue 3.5 Y Value 4.75 Chroma 9.0 Pantone Matching System: PMS 146 Spectrophotometer Readings: N/A Viscosity Range: 14000-17000 CPS PH Range: 8.7-9.0 Gloss Average: 94.21 CIE L*a*b* Values: L*52.06 a*12.26 b*40.34 Tint Strength: 90.70