Pigments Checker

lac dye

Extracted from the lac insect, Laccifer Llacca or Coccus lacca and then precipitated with aluminium hydroxide;

Manufacturer / product code:  Kremer / 36020
Chemical description: made from Coccus Lacta, laccaic acid. Kremer PDF
Color: red
Color Index: NR25


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”

Lac dye 36020 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”

lac dye