Abstract: A process color offset duplicator uses a plurality of duplicator heads arranged serially to print full process color. The duplicator heads are adapted to apply a thin layer of ink onto plates held on their respective plate cylinders, in order that plate cylinders which are prepared using a dot screen can be used. The plate cylinders further include registration pins, whereby tha various ones of said plates can be mounted in relative alignment on different ones of said plate cylinders.

Abstract: A method of providing full range color printing using duplicator technology is disclosed. The system utilizes subtractive color printing techniques, but avoids the necessity for color masking and generally eliminates color correction as well. Following exposure of multiple negatives to develop color separations, corresponding printing plates are prepared and developed. A proofing sequence is optional between the development of the negatives and the plates. The ultimate printing is achieved by feeding stock into a duplicator which carries each of the three basic negative complementary colors, in sequence; a "black" printer can also be used for a higher degree of contrast and tone.