. However, the drying pro- cess usually leads to undesirable changes in some quality parameters as, for instance, nutritional losses (Ratti, 2001), and these changes were not yet sufficiently studied to make them available to processing industry and consumers. Therefore, the aim of this work was to describe the effect of air tem- perature on drying kinetics and on retention of antioxidant capacity of apple leathers, formulated with and without potas- sium metabisulphite (KM).