Brown pigments + linseed oil
1 . IR spectrum of Brown ochre + linseed oil
2 . IR spectrum of Burnt umber (Sennelier) + linseed oil
3 . IR spectrum of Burnt Umber (Winsor & Newton) + linseed oil
4 . IR spectrum of Fawn ochre + linseed oil
 
...:::... Institute of Chemistry, University of Tartu, Estonia ...:::...