Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

 Previous item  Up One Level Next item


A natural product composed of magnesium silicate and iron compounds, and used as a coloring pigment. The "false" umbers are brown ochers produced artificially by burning the hydrated iron earths. Burnt umber is the calcined raw umber. (60 , 235 )

[Search all CoOL documents]

Timestamp: Saturday, 19-Nov-2011 13:18:45 PST
Retrieved: Tuesday, 26-Mar-2019 03:03:20 GMT