Umber burnt natural pigment powder
Chemical description: burnt natural umber. Clay rock with iron content of 25% and manganese up to 20%.
Alkali resistance: 5
Lime Resistance: 5
Acid resistance: 5
Color Index: PBr 8
Suitability Acrylic, Fresco, Ceramics, Oil, Tempera, Watercolor / Gouache, Cement / Plaster
Average spreading rate