Chroma Black is the perfect mixing black. Chromatically neutral, semi-transparent and gentle in strength. Especially useful to reduce the intensity of greens. 

Pigment Composition - Complex Silicate of Sodium and Aluminum with Sulfur (PB 29), Calcined Natural Iron Oxide (PBr 7) Lightfast Rating - Excellent - LF I Opacity Rating - Semi Transparent Drying Time - Moderate