will conveniently be provided in the apparatus 62 for another exposure of the same film member 43 or different one the carrier 60 is lowered to its original position for additional toning the capsule 10 may be replaced by a fresh one or reused another time or two if toner remains the apparatus 62 may be varied by having the capsule 10 move to a position in juxtaposition to the film 44 without moving the film in which case the blinder member 88 may be eliminated and means must be provided to prevent the corona wire 66 from interfering with movement of the capsule 10 the operation of the apparatus as explained above takes into account what happens during the processing of the film 44 this is probably best explained in connection with fig1 in fig1 it is assumed that the capsule 10 is being squeezed and the spongelike mass is being compressed the toner suspension absorbed in the capillaries of the mass 26 comprises minute particles of carbon resin and the like either black or colored in a liquid which has an electrophoretic relationship with the particles this means that in the suspension the movement of the particles has caused them to assume a surface charge which they retain when they are expressed from the spongelike mass in most cases these charges are positive charges and in order to indicated this streams of liquid suspension 90 are shown emerging from.