burnt umber

A natural mixture of iron and manganese oxides and hydroxides. Used throughout history,

Manufacturer / product code:  Kremer / 40710
Chemical description: natural brown earth, containing manganese oxides, from Cyprus. KREMER PDF
Color: brown
Color Index: PBr8
More info: Pigments Through The Ages  Colourlex

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Raman Spectroscopy 532 nm – ElviRa Spectrometer for Art

Raman Spectroscopy 532 nm (ElviRa spectrometer) Pigments-Checker Database

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 Raman spectroscopy 785 nm

Pigments (powder, no binder)

Raman Spectroscopy 785 nm Pigments (pure, no binder)

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Pigments with acrylic binder (Pigments Checker)

Raman Spectroscopy 785 nm Pigments-Checker Database

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Pure pigments (no binder, just powder)

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

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Raman spectroscopy 830 nm

Pigments (powder, no binder)

Raman Spectroscopy 830 nm Pigments-Checker Database

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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.

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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

DOWNLOAD Free Reflectance Database

DOWNLOAD paper:  “FORS spec­tral data­base of his­tor­i­cal pig­ments in dif­fer­ent binders”

 

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

FTIR Diffuse Reflectance Spectroscopy Pigments-Checker Database

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