Fig. 6From: A study of “The Portrait of F.P. Makerovsky in a Masquerade Costume” by Dmitry Levitsky from the collection of the State Tretyakov GalleryCharacteristic IR spectra of cross-sections of samples: No. 1 a 1—dark ground, 2—light ground, 3—brown, 4—green; No. 2 b 1—ground, 2—light inter-layer in the ground, 3—dark grey, 4—green; No. 3 c 1—ground, 2—light inter-layer in the ground, 3—brown, 4—green; No. 4 d 1—ground; 2—brownBack to article page