It has a jet black colour

CI Number: NACI Name: PG23Pigment Name: Natural Ferrous Silicate containing Magnesium and Aluminum Potassium SilicatesLightfastness: ASTM I - ExcellentOpacity: TransparentGrind: Medium

26Viscosity Range: 400-1000 CPSCIE L*a*b* Values: L*26

Many of these pigments are now also manufactured synthetically

pitt pastel farveblyant 179 bistre B23 It has a jet blackPitt pastel colored pencils in high quality Unmatched lightfastness and colour brilliance Grease and oil free Ideal for fine details To be sharpened with sharpening knife 181398, sharpening machine 180963 or 181463 Available in 60 individual colours or in different assorted sets Wood from certified and sustainable forestry Environmentally friendly and water based varnish