Gustavo Adrian Defeo is the CEO of Ars Tinctoria S.r.l. He graduated at Dipl. Chemistry ENET N.1 Otto Krause, Argentina. He has 38 years of experience as a leather and materials analyst and in industrial dyes and chemicals production at Ciba-Geigy Argentina, Zschimmer & Schwarz AG., UNITAN S.A.I.C.A., Codyeco S.p.A., Bayer AG and Lanxess AG. His research interests are leather and materials chemicals, fastness and physical analysis, and colour and light physics and appearance. He is a Fellow of the Society of Leather Technologists and Chemists (UK), Convener of CEN TC 289 WG2 and WG3 (European Normalisation Committee), Chairman of ISO IULTCS IUF and IUP commissions (International Union of Leather Chemists and Technicians Societies, fastness and physical tests commission), Italian delegate to CEN TC 289 WG1 and to ISO IULTCS IUC Committee (chemical tests normalisation), and in 1993 he received the Donald Burton Memorial Prize.