Table 1. Description of drying procedure.

Procedure	Description
I	Convective drying
II	Convective drying enhanced with microwaves throughout the process
III	Convective drying enhanced with microwaves during the first 40 min of the process
IV	Convective drying enhanced with microwaves after the 120th min of the process
V	Convective drying enhanced with microwaves throughout the process and IR periodically. The whole process consists of 6 phases. The IR radiation was applied only in phases 1, 3 and 5. The length of these phases was controlled by the temperature of the sample surface, a phase was terminated when the predetermined temperature was reached (333.15 K, i.e. 60 °C in phase 1 and 343.15 K, i.e. 70 °C in phases 3 and 5). In phases 2 and 4 (15 min each) and 6 (60 min) the microwave-assisted convective drying was performed