Fig. 13From: Selective damage induced by pigment-medium interactions in a Neoplasticist oil canvas painting: Composition dans le cône avec couleur orange by G. Vantongerloo (1929)GC–MS chromatogram of sample 1 in which castor wax was identified by its markers: a mass spectrum and chemical structure of 12-methoxy stearic acid ME; b mass spectrum and chemical structure of 12-hydroxy stearic acid MEBack to article page