Pigments Checker

indigo

It was used in European easel painting since the Middle Ages. Marco Polo (13th century) was the first to report on the preparation of indigo in India.

Manufacturer / product code:  Kremer / 36005 (V.1); Kremer / 36000 (V.2) 
Chemical description: fermented extract from the leaves of indigofera tinctoria, precipitated with aluminium hydroxide. Kremer PDF  
Color: blue
Color Index: NB1
More info: Pigments Through The Ages  Colourlex


Raman spectroscopy

DOWNLOAD Free Raman Database

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

Indigo 36000 Raman Spectroscopy Pigments Checker


XRF spectroscopy

DOWNLOAD Free Online Database

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


Reflectance spectroscopy

DOWNLOAD Free Reflectance Database

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

Indigo