Pyrrole Red Pigment Classification: Synthetic Organic Chemical Description: Pyrrolopyrrol Opacity/Transparency: 3 Lightfastness Rating: I Permanency: Excellent Colour Index Name: PR 254 Colour Index Number: 56110 Munsell Notation Listing: Hue: 6.5 R Value: 4.25 Chroma: 17.0 Pantone Matching System: 186 Spectrophotometer Readings: N/A Viscosity Range: 23000-27000 CPS PH Range: 8.3-9.0 Gloss Average: 88.11 CIE L*a*b* Values: L*42.26 a*54.60 b*31.25 Tint Strength: 73.37