MICROWAVE DRYING AND DISINFECTION OF PAPER DOCUMENTS

A new advanced microwave drying technology has been developed using a continuous dryer combined with an air cooler and simultaneous disinfection process. The principle of the new technology consist of using microwave absorption filters made from special porous ceramics which act as both absorbent and transparent material for microwaves. Ceramic slabs reduce intensity of the microwave radiation to such an extent where overheating and hot-spots formation is prevented as well as other kinds of damages, including red-heating of metallic objects. All books and documents are recovered in high quality without any damage of the gold printing, colored reproductions, metallic objects and other components sensitive to microwaves. Moreover, the technology also killed moulds and their spores and, therefore, an additional disinfection is not necessary.