Naturalorganicsubstancesareinvolvedinmanyaspectsoftheculturalheritage field. Theirpresencein
different forms(raw,heated,mixed),withvariousconservationstates,constitutesarealchallenge
regardingtheirrecognitionanddiscrimination.Theircharacterizationusuallyinvolvestheuseof
separativetechniqueswhichimplydestructivesamplingandspecific analyticalpreparations.Herewe
propose anondestructiveapproachusingFT-Ramanandinfraredspectroscopiesfortheidentification
and differentiationofnaturalorganicsubstances.Becauseoftheirrelatedfunctionalgroups,theyusually
present similarvibrationalsignatures.Neverthelesstheuseofappropriatesignaltreatmentand
statistical analysiswassuccessfullycarriedouttoovercomethislimitation,thenproposingnewobjective
discriminating methodologytoidentifythesesubstances.Spectraldecompositioncalculationswere
performed ontheCHstretchingregionofalargesetofreferencematerialssuchasresins,oils,animal
glues, andgums.Multivariateanalyses(PrincipalComponentAnalyses)werethenperformedonthe
fitting parameters,andnewdiscriminatingcriteriawereestablished.Asetofpreviouslycharacterized
archeological resins,withdifferentsurfaceaspectsoralterationstates,wasanalyzedusingthesame
methodology.Thesetestingsamplesvalidatetheefficiency ofourdiscriminatingcriteriaestablishedon
the referencecorpus.Moreover,weprovedthatsomealterationorageingoforganicmaterialsisnotan
issue totheirrecognition.