for a laundry treatment process is displayed in each display area 17 to 22 for a different type of items of laundry for example in display area 20 items of laundry made of synthetic fibers are displayed in display area 21 items of laundry made of cotton are displayed in display area 22 items of laundry made of multicolored textiles are displayed in display area 17 items of white un dyed laundry are displayed etc according to one particular embodiment only the type of the material of the identified items of laundry is displayed but not the number per type of material clusters 25 27 28 29 30 are formed by the control device 8 and its decision maker 10 preferably a spectrometer the formation involves the control device 8 performing a frequency calculation as to how frequently a certain type of laundry was identified for example how many items of laundry can be washed at 30 u00b0 c how many items of laundry can be washed at 40 u00b0 c how many items of laundry can be washed at 60 u00b0 c how many items of laundry can be washed at 90 u00b0 c and how many can be dry cleaned an example of a spectrum of these clusters is schematically represented in fig3 as the next method step after the cluster formation the control device 8 calculates with its decision maker 10 a laundry treatment program suitable for the identified items of laundry for example a combined washing.