A calender for working materials requiring one or both rolls of a laminating pair of rolls to have a thermoregulated mantel having a surface morphology comprising engravings, grooves or embossings of geometry, distribution and dimensions specific for morphological characteristics to be conferred to the laminated material, comprising a first roll with a hollow shaft supported in bearings installed in support blocks shiftable along parallel guides over two side shoulders or risers (5a, 5b) of a fixed structure of the calender by way of actuators in order to adjust the nip between the first roll and a second roll, of similar structure of the first roll, rotatable two-way hydraulic joints coupled to one end of the hollow shafts of both rolls (1, 2a) for circulating a thermoregulation fluid through inlet and outlet flow distributing manifolds internal to the hollow shafts of the rolls and hydraulically connected to respective nozzles of a hydraulic pumping unit, characterized in that - said side shoulders (5a, 5b) of the fixed structure of the calender support respective rotatable disks (9a, 9b) on which are mounted bearings for supporting hollow shafts of a plurality of second rolls (2a, 2b) having different surface morphologies on their mantels, and which are selectable for use by rotating by a certain angle in a direction or in the opposite direction said rotatable disks (9a, 9b), as far as bringing the desired one of said plurality of second rolls to a counter-opposed position to said first roll; - to a first rotatable disk supporting said ends of hydraulic coupling of the hollow shafts of said second rolls (2a, 2b) is axially connected a blind end of a tubular distributor-collector having pairs of inlet and outlet nozzles of the thermoregulation fluid connected by flexible tubes to respective rotatable two-way hydraulic joints for hydraulic connection to the ends of respective hollow shafts of said second rolls (2a, 2b), the other end of the distributor-collector being coupled to a rotatable two-way primary hydraulic joint, hydraulically connected by a pair of tubes to said respective nozzles of the pumping uniit; - to the other rotatable disk supporting the opposite ends of the hollow shafts of the second rolls (2a, 2b) is connected a counter-plate on which are installed individual motor-speed reducing gear box groups (M2a, M2b) of motion transmission through mechanical couplings to the respective hollow shafts; - motorized means (M9, 9', 9", 9'") for rotating said rotatable disks (9a, 9b) in one direction or in the opposite direction by a given angle of rotation being further comprised. - said side shoulders (5a, 5b) of the fixed structure of the calender support respective rotatable disks (9a, 9b) on which are mounted bearings for supporting hollow shafts of a plurality of second rolls (2a, 2b) having different surface morphologies on their mantels, and which are selectable for use by rotating by a certain angle in a direction or in the opposite direction said rotatable disks (9a, 9b), as far as bringing the desired one of said plurality of second rolls to a counter-opposed position to said first roll; - to a first rotatable disk supporting said ends of hydraulic coupling of the hollow shafts of said second rolls (2a, 2b) is axially connected a blind end of a tubular distributor-collector having pairs of inlet and outlet nozzles of the thermoregulation fluid connected by flexible tubes to respective rotatable two-way hydraulic joints for hydraulic connection to the ends of respective hollow shafts of said second rolls (2a, 2b), the other end of the distributor-collector being coupled to a rotatable two-way primary hydraulic joint, hydraulically connected by a pair of tubes to said respective nozzles of the pumping uniit; - to the other rotatable disk supporting the opposite ends of the hollow shafts of the second rolls (2a, 2b) is connected a counter-plate on which are installed individual motor-speed reducing gear box groups (M2a, M2b) of motion transmission through mechanical couplings to the respective hollow shafts; - motorized means (M9, 9', 9", 9'") for rotating said rotatable disks (9a, 9b) in one direction or in the opposite direction by a given angle of rotation being further comprised.