Quinacridone Burnt OrangeColor: Quinacridone Burnt Orange Permanence: AA Opacity: Semi transparent Pigment: PR206 Pigment description: Quinacridone ASTM Rating Ligthfastness: I Pigment classification: Synthetic organic Color Index Number: 73900 73920 Viscosity range (mPa. s): 800 1. 500 Color Index The pigments used for artists colors are inorganic as well as organic. The inorganic pigments have been used since antiquity; most of them are extracted from minerals and soil,