Applied analysis of lacquer films based on pyrolysis-gas chromatography / mass spectrometry

Ancient lacquer film,a Nanban lacquer film,an old lacqur-ware abject imported from an Asian country,and the Baroque and Rococo lacquer films were analyzed by pyrolysis-gas chromatography / mass spectrometry.Compared with the results of the natural lacquer film,it was revealed that the ancient lacquer film and Nanban lacquer film were made from Rhus vernicifera,and the old lacquer-ware imported from an Asian country was made from Melanorrhoea usitata.However,the Baroque and Rococo lacquer films obtained from the Doerner Institute in Munich,Germany were made from natural resins.3-Pentadecylcatechol (MW=320) (urushiol),3-heptadecylcatechol (MW=348) (laccol),and 4-heptadecylcatechol (MW=348) (thitsiol) were the main products of pyrolysis of R.vernicifera,Rhus succedanea,and M.usitata.