A method of operating a calender and calendering

It is specified with at least one heating roll (3), a calender (1) which is connected to a heat transfer medium supply device (8) and with a counter-element (2, 4), a nip (9, 10), through the (a web of material 11) is guided, and means (13, 14) for generating a predetermined pressure in the nip (9, 10). Further, a method is provided for operating a calender. One would like to increase the availability of such a calender at a grade change. For this purpose, it is provided that the heat roll (3) having acting on its surface inductive heating device (15) which is connected to a control device (19), stored in the paper-related fixed sizes, as parameters for controlling the inductive heating device (15).