Pyrrole Orange Pigment Classification: Synthetic Organic Chemical Description: Dipyrrolopyrrol Opacity/Transparency: 5 Lightfastness Rating: NA Permanency: Excellent Colour Index Name: PO 73 Colour Index Number: NA Munsell Notation Listing: Hue: 9.0 R Value: 5.00 Chroma: 18.0 Pantone Matching System: 1655 Spectrophotometer Readings: N/A Viscosity Range: 23000-27000 CPS PH Range: 8.7-9.0 Gloss Average: 70.05 CIE L*a*b* Values: L*55.97 a*59.52 b*53.43 Tint Strength: 81.55