Abstract: An apparatus and method for adjusting color and gray balance in a color printer, wherein a multicolored output sheet including a set of printer color balance adjustment instructions for performing color balance adjustments processor is produced by the print engine. A processor provides a color balance judging indicator, from to a scanned test pattern sheet in the case of a copier or from a memory electronically storing a test image. A controller is used to for transmit the set of printer color and gray balance adjustments to the processor.

Abstract: A method of manufacturing dust-free spheroidized magnetite beads comprising the steps of introducing raw magnetic ore particles in the presence of an inert non-oxidizing carrier gas to a carbon arc plasma flame assembly to which is fed a controlled amount of nitrogen and argon gas, melting the ore particles to form spheroidized droplets thereof, allowing the spheroidized droplets to fall by gravity in a chamber having a controlled atmosphere while at the same time sweeping the inside chamber wall with a vertical flow of air or an inert gas and providing a horizontal curtain of air or an inert gas at a specific location within the chamber to remove dust formed in the process. The droplets are cooled forming beads of ore, which may be used as a xerographic carrier without further processing.