into the outlet chamber 110 by the air pressure created as air escapes from the slurry the pressure forces the foam through the reject outlet without the need for pumps paddles vacuum or the like it is desirable to keep the slurry level in the general area of the height of weir plate 104 if the slurry level rises above the top of the weir plate acceptable fiber will be lost out the foam reject outlet preferably the slurry level is sufficiently below the weir plate that surface waves will not crest over the top of the weir plate if the slurry level falls below the bottom of weir plate 104 ink laden foam can be drawn along with the acceptable slurry through the outlet 20 a pressurized flotation module such as that just described can be operated with stock consistencies from about 0 1 to 5 solids and can be used on all raw materials with any deinking chemistry the pressurized module is able to efficiently handle high foaming stocks one particular advantage of the present flotation module is that the foam laden reject flow is under pressure and is forced through a control valve 28 the high shear experienced by the foam in the control valve breaks down the foam at the valve so that the outlet from the valve is a liquid which is much easier to handle than the foam obtained in atmospheric flotation modules as mentioned previously another of the distinct advantages of the present invention is that through the use of recycle loops a pressurized flotation module of minimal physical size can be used to remove the desired amount of contaminant this is.