Method for determining laundry properties in a tumble dryer with a horizontally rotatable laundry drum and a resistance measuring device with two measuring electrodes, and a control unit, in which a) the electrical resistance R between the measuring electrodes is measured as a function of the time t while the laundry drum is rotating; b1) the electrical resistance R(t) measured as a function of the time t is transformed into a frequency spectrum and the maximum frequency f m corresponding to an amplitude maximum of the electrical resistance R(t) is determined b2) the electrical resistance R(t) measured as a function of the time t is averaged over a predetermined period of time Δt and registered as a time-dependent resistance mean value R m (t); c) the time-dependent resistance mean value R m (t) is evaluated in respect of an initial resistance mean value Rs and/or a temporal change ΔR m /Δt of the time-dependent resistance mean value R m (t) d1) the type of laundry is determined for a predetermined initial laundry humidity Hs by evaluating the initial resistance mean value Rs determined in step c) and the maximum frequency f m on the basis of an association, stored for various initial laundry humidities H s and different types of laundry, between the initial resistance mean value Rs and the maximum frequency f m, or d2) an association between the initial resistance mean value Rs and the maximum frequency f m is evaluated in respect of an initial laundry humidity Hs and the dry weight M dry for a predetermined type of laundry on the basis of an association, stored for initial laundry humidities Hs and different types of laundry, between the mean value Rm(t) of the resistance and the maximum frequency fm and the dry weight. a) the electrical resistance R between the measuring electrodes is measured as a function of the time t while the laundry drum is rotating; b1) the electrical resistance R(t) measured as a function of the time t is transformed into a frequency spectrum and the maximum frequency f m corresponding to an amplitude maximum of the electrical resistance R(t) is determined b2) the electrical resistance R(t) measured as a function of the time t is averaged over a predetermined period of time Δt and registered as a time-dependent resistance mean value R m (t); c) the time-dependent resistance mean value R m (t) is evaluated in respect of an initial resistance mean value Rs and/or a temporal change ΔR m /Δt of the time-dependent resistance mean value R m (t) d1) the type of laundry is determined for a predetermined initial laundry humidity Hs by evaluating the initial resistance mean value Rs determined in step c) and the maximum frequency f m on the basis of an association, stored for various initial laundry humidities H s and different types of laundry, between the initial resistance mean value Rs and the maximum frequency f m, or d2) an association between the initial resistance mean value Rs and the maximum frequency f m is evaluated in respect of an initial laundry humidity Hs and the dry weight M dry for a predetermined type of laundry on the basis of an association, stored for initial laundry humidities Hs and different types of laundry, between the mean value Rm(t) of the resistance and the maximum frequency fm and the dry weight.