Graphite Gray Pigment Classification: Synthetic Inorganic Chemical Description: Crystallized Carbon Opacity/Transparency: 3 Lightfastness Rating: I Permanency: Excellent Colour Index Name: PBk 10 Colour Index Number: 77265 Munsell Notation Listing: Hue: Black Value 3.00 Chrome 0.7 Pantone Matching System: PMS 7540 Spectrophotometer Readings: N/A Viscosity Range: 23000-27000 CPS PH Range: 8.3-9.0 Gloss Average: 14.18 CIE L*a*b* Values: L*38.70 a*0.52 b*0.60 Tint Strength: 84.22