Detailed Product Description Piment Red 57:1Offset Ink:easily dispersable,good dyeing force,transparentSolvent Ink:transparent ,easily dispersable.Plastic: easily dispersable,good heat resistance,good weather resistance Light Fastness: 5-6Heat Resistance: 180 Color Shade: Blueish RedMolecular Weight: 424.46Molecular Formula: C18H12N2O6SCaOil absorption(ml/100g): 45-55PH: 7.0-8.0