Raw Umber from Cyprus (slightly greenish)

 
Sample ID:
PK40660
Origin:
Mineral; Provenance: Cyprus
Chemical Information:
Natural brown umber
Sample Type:
Reference material
Description:
Powder sample (0-120 µ)
History of use:
Since antiquity
Sample Source:
Kremer Pigments
Alternative names:
C.I. Pigment Brown 8, PBr8, Manganese Brown
Material Class:
Earth pigments
Acquisition Conditions:
Current intensity: 10.60 µA
Tube voltage: 40 kV
Analysis time: 300 s
No filtering, air atmosphere