Method and apparatus for user customized colorants in an electrophotographic printing machine

An electrophotographic printing machine of the type having a photoconductive surface on which a developed image is formed for producing a plural color image on a sheet substrate, comprising:

• means for charging the photoconductive surface;
• image generating means for exposing the charged portion of the photoconductive surface to record a latent image on the charged photoconductive surface;
• image developing means for developing the latent image recorded on the photoconductive surface, said image developing means includes a plurality of developer units with each of said developer units having different color developer materials and each of said developer units being electrically biased to various levels;
• adjusting means for adjusting in combination said charging means, said image generating means, and said image developing means so as to attract developer materials to the photoconductive surface in varying relative quantities from each of said plurality of developer units which produce the developed image thereby forming a developed image having a desired color;
• and
• means, responsive to said adjusting means, for storing electronic signals corresponding to selected adjustments of said adjusting means.