Burnt umber (Winsor & Newton) + linseed oil

IR spectra of Burnt Umber (Fe2O3+MnO2+clay) mixed with linseed oil

This burnt umber is Winsor & Newton’s product.


ATR-FT-IR spectrum 

Burnt umber (W&N) + linseed oil

IR spectrum with ATR-correction 

The low wavenumber region (far-IR region) of this IR spectrum is presented and discussed in the following paper: Spectrochimica Acta Part A, 2010, 75, 1061–1072.

Burnt umber (W&N) + linseed oil (ATR-corrected)