The accumulation of synthetic plastics, from food packaging and food waste are two major problems in the food industry. Therefore the development of new packaging materials and systems has atractted a lot of research interest. Active and intelligent packaging systems are promising tools to reduce food waste, while edible and biodegradable films and coatings can be the answer to the environmental problems caused by synthetic plastic food packaging [1]. Intelligent packaging devices can be obtained by applying data carriers (such as barcode labels and radio frequency identification (RFID)), sensors and indicators (such as time-temperature, gas, freshness). Usually the indicator systems provide qualitative information via color changing [2]. Because food spoilage leads frequently to pH changes, colorimetric pH indicators are mostly used. Applications of edible and biodegradable films are based on their capabilities to prevent moisture loss, aromas loss, solute transport, water absorption in the food matrix or oxygen penetration [3]. In this work six different time-temperature indicators (TTI) based on PVA and/or chitosan polymeric films containing two new xanthylium dyes incorporated as sensing dyes, were prepared. The xanthylium derivatives were characterized by UVVis, FT-IR,1D and 2D NMR spectroscopic analysis. The TTI were characterized by FT-IR, UV-Vis and thermal analysis techniques. The efficiency of these films was demonstrated on two food products subjected to improper storage temperatures to obtain information on food quality changes.