raw umber

Used throughout history,  it has different earth tones depending on the amount of iron and manganese compounds.

Manufacturer / product code:  Kremer / 40610
Chemical description: natural mixture of iron and manganese oxides and hydroxides. Brown earth, from Cyprus. Kremer PDF
Color: brown
Color Index: PBr8
More info: Pigments Through The Ages  Colourlex


 Raman spectroscopy

Pigments (powder, no binder)


Raman Spectroscopy 785 nm Pigments (pure, no binder)


Pigments with acrylic binder (Pigments Checker)

Raman Spectroscopy 785 nm Pigments-Checker Database


Pure pigments (no binder, just powder)

DOWNLOAD Free Raman Database

DOWNLOAD  paper:   “Pigments Checker version 3.0, a handy set for conservation scientists: A free online Raman spectra database”

Raw umber 40610 Raman Spectroscopy Pigments Checker


 

XRF spectroscopy

XRF Spectroscopy Pigments-Checker Database

DOWNLOAD previous database from Pigments Checker V.3      DOWNLOAD paper: R. Larsen, N. Coluzzi, A. Cosentino “Free XRF Spectroscopy database of Pigments Checker” Intl Journal of Conservation Science.


Reflectance Spectroscopy (200-1000 nm) – GorgiasUV Spectrometer

Reflectance Spectroscopy (200-1000 nm) (GorgiasUV) Pigments-Checker Database

Reflectance spectroscopy- Gorgias spectrometer for Art

Reflectance Spectroscopy (350-950 nm) (Gorgias) Pigments-Checker Database

raw umber

NIR Reflectance spectroscopy


NIR-Reflectance Spectroscopy (930-1690 nm) Pigments-Checker Database


FT-IR Spectroscopy (Non-invasive Diffuse Reflectance Probe)

FTIR Diffuse Reflectance Spectroscopy Pigments-Checker Database

FTIR non-invasive Spectroscopy Pigments (pure, no binder) Database

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