Naphthol Red Light Pigment Classification: Synthetic Organic Chemical Description: Naphthol AS-D Opacity/Transparency: 4 Lightfastness Rating: II Permanency: Very Good Colour Index Name: PR 112 Colour Index Number: 12370 Munsell Notation Listing: Hue 7.0 R Value 4.25 Chroma 17.0 Pantone Matching System: PMS 1797 Spectrophotometer Readings: N/A Viscosity Range: 18000-22000 CPS PH Range: 8.3-9.0 Gloss Average: 49.20 CIE L*a*b* Values: L*44.02 a*50.85 b*32.40 Tint Strength: 72.21