A method of color management for image marking devices utilizes an automated spot color editor having a control module accessing a graphical user interface. The first and second layers have compositions which are same or substantially same as each other on an interface therebetween. Reflected light or transmitted light from the object is photographed with a CCD camera and taken into a computer as data. Following the cleavage reaction, the mixture is fed from the tank into a rectification column, whereby the ethylene glycol produced from the cleavage reaction is returned to the PET production process. An expansion nozzle or body located downstream of the throat area provides expansion of the combustion gases produced by the combustion chambers so as to increase the net thrust. Similarly, a second controller is provided for controlling the operation of the semiconductor power switching devices of the network bridge.