An image formation apparatus for forming a color image, having an image combining member for overlapping a plurality of different mono-color images formed by an electrophotographic process with a plurality of respective different colorants to form the color image thereon and a density measuring unit...http://www.google.es/patents/US5325153?utm_source=gb-gplus-sharePatente US5325153 - Color image formation apparatus with density measurement
Color image formation apparatus with density measurement
