the apparatus of the preferred embodiments will be described in accordance with an electrophotographic recording medium the invention however is not limited to apparatus for creating images on such a medium as other media such as photographic film etc may also be used with the invention because electrophotographic reproduction apparatus are well known the present description will be directed in particular to elements forming part of or cooperating more directly with the present invention apparatus not specifically shown or described therein are selectable from those known in the prior art the invention can be used in a variety of electrophotographic applications it will be described with regard to the electronic printer of fig2 in the prior art as represented by international publication number wo 90 01 730 and u s pat no 5 040 003 images can be formed consecutively on the same image frame of a photoconductor without fixing the first image by the use of successive steps of charging exposing and developing and then repeating such steps for each color to be created upon that image frame the resulting multicolor image is then transferred to a receiving sheet in one step thereby increasing the productivity of the printer or the copier the exposure steps as taught in these publications are carried out using separate led light emitting diode printheads for each color to be formed typically these printheads have a single row of several thousand leds arranged at say 300 400 or 600 dots per inch or equivalently 11 81 15 75 23 62 dots per mm respectively across the photoconductor and.