| study of the influencing effect of pigments on the photoageing of terpenoid resins used as pictorial media. | terpenoid resins have been mainly used as components of pictorial varnishes and binding media from ancient times. in such latest instances, the resin is mixed with pigments affecting its physical and chemical properties. a new procedure based on gas chromatography-mass spectrometry (gc/ms) has been applied, in this work, in combination with fourier transform infrared spectroscopy (ftir), with the aim of determining the changes undergone by di- and triterpenoid resins employed as components of bi ... | 2006 | 16687153 |