This invention relates to water developable, negative working photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process. The invention provides both overlay and transfer type proofing sheets which have good fingerprint resistance.
Water developable, negative working overlay color proofing system utilizing water soluble polymeric diazonium compound; water insoluble, water swellable binder resin; and a colorant