Raman study of synthetic organic pigments and dyes in early lithographic inks (1890-1920) Centeno, Silvia A. ; Buisan, Virginia Lladó ; Ropret, Polonca Abstract Publication: Journal of Raman Spectroscopy Pub Date: October 2006 DOI: 10.1002/jrs.1594 Bibcode: 2006JRSp...37.1111C